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73415 | https://en.wikipedia.org/wiki/Sieve%20of%20Eratosthenes | Sieve of Eratosthenes | In mathematics, the sieve of Eratosthenes is an ancient algorithm for finding all prime numbers up to any given limit.
It does so by iteratively marking as composite (i.e., not prime) the multiples of each prime, starting with the first prime number, 2. The multiples of a given prime are generated as a sequence of num... | Mathematics | Prime numbers | null |
73421 | https://en.wikipedia.org/wiki/Lilium | Lilium | Lilium ( ) is a genus of herbaceous flowering plants growing from bulbs, all with large and often prominent flowers. Lilies are a group of flowering plants which are important in culture and literature in much of the world. Most species are native to the Northern Hemisphere and their range is temperate climates and ext... | Biology and health sciences | Monocots | null |
73426 | https://en.wikipedia.org/wiki/Iris%20%28plant%29 | Iris (plant) | Iris is a flowering plant genus of 310 accepted species with showy flowers. As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera. A common name for some species is flags, while the plants of the subgenus Scorpiris... | Biology and health sciences | Monocots | null |
73448 | https://en.wikipedia.org/wiki/Mangrove | Mangrove | A mangrove is a shrub or tree that grows mainly in coastal saline or brackish water. Mangroves grow in an equatorial climate, typically along coastlines and tidal rivers. They have particular adaptations to take in extra oxygen and remove salt, allowing them to tolerate conditions that kill most plants. The term is al... | Physical sciences | Forests | null |
73469 | https://en.wikipedia.org/wiki/Yucca | Yucca | Yucca is a genus of perennial shrubs and trees in the family Asparagaceae, subfamily Agavoideae. Its 40–50 species are notable for their rosettes of evergreen, tough, sword-shaped leaves and large terminal panicles of white or whitish flowers. They are native to the Americas and the Caribbean in a wide range of habitat... | Biology and health sciences | Monocots | null |
73592 | https://en.wikipedia.org/wiki/Toxoplasmosis | Toxoplasmosis | Toxoplasmosis is a parasitic disease caused by Toxoplasma gondii, an apicomplexan. Infections with toxoplasmosis are associated with a variety of neuropsychiatric and behavioral conditions. Occasionally, people may have a few weeks or months of mild, flu-like illness such as muscle aches and tender lymph nodes. In a sm... | Biology and health sciences | Protozoan infections | Health |
73614 | https://en.wikipedia.org/wiki/Exocytosis | Exocytosis | Exocytosis () is a form of active transport and bulk transport in which a cell transports molecules (e.g., neurotransmitters and proteins) out of the cell (exo- + cytosis). As an active transport mechanism, exocytosis requires the use of energy to transport material. Exocytosis and its counterpart, endocytosis, are use... | Biology and health sciences | Cell processes | Biology |
73638 | https://en.wikipedia.org/wiki/Quercus%20alba | Quercus alba | Quercus alba, the white oak, is one of the preeminent hardwoods of eastern and central North America. It is a long-lived oak, native to eastern and central North America and found from Minnesota, Ontario, Quebec, and southern Maine south as far as northern Florida and eastern Texas. Specimens have been documented to be... | Biology and health sciences | Fagales | Plants |
73644 | https://en.wikipedia.org/wiki/Fagaceae | Fagaceae | The Fagaceae (; ) are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with about 927 species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species occur as evergreen trees and shrubs. They are characterized by alternate simple leaves... | Biology and health sciences | Fagales | Plants |
73664 | https://en.wikipedia.org/wiki/Astrolabe | Astrolabe | An astrolabe ( , ; ; ) is an astronomical instrument dating to ancient times. It serves as a star chart and physical model of visible half-dome of the sky. Its various functions also make it an elaborate inclinometer and an analog calculation device capable of working out several kinds of problems in astronomy. In it... | Technology | Measuring instruments | null |
74007 | https://en.wikipedia.org/wiki/Technology%20assessment | Technology assessment | Technology assessment (TA, , ) is a practical process of determining the value of a new or emerging technology in and of itself or against existing technologies. This is a means of assessing and rating the new technology from the time when it was first developed to the time when it is potentially accepted by the public... | Technology | General | null |
74141 | https://en.wikipedia.org/wiki/Subtraction | Subtraction | Subtraction (which is signified by the minus sign ) is one of the four arithmetic operations along with addition, multiplication and division. Subtraction is an operation that represents removal of objects from a collection. For example, in the adjacent picture, there are peaches—meaning 5 peaches with 2 taken away, r... | Mathematics | Basics | null |
74202 | https://en.wikipedia.org/wiki/Stork | Stork | Storks are large, long-legged, long-necked wading birds with long, stout bills. They belong to the family Ciconiidae, and make up the order Ciconiiformes . Ciconiiformes previously included a number of other families, such as herons and ibises, but those families have been moved to other orders.
Storks dwell in many ... | Biology and health sciences | Pelecanimorphae | null |
74204 | https://en.wikipedia.org/wiki/Locust | Locust | Locusts (derived from the Latin locusta, locust or lobster) are various species of short-horned grasshoppers in the family Acrididae that have a swarming phase. These insects are usually solitary, but under certain circumstances they become more abundant and change their behaviour and habits, becoming gregarious. No ta... | Biology and health sciences | Orthoptera | null |
74223 | https://en.wikipedia.org/wiki/Ulmus%20americana | Ulmus americana | Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America. The trees can live for several hundred years. It is a very hardy species that can withstand low winter temperatures, but it is affected by Dutch elm disease.
The w... | Biology and health sciences | Rosales | Plants |
74225 | https://en.wikipedia.org/wiki/Chili%20pepper | Chili pepper | Chili peppers, also spelled chile or chilli ( ), are varieties of berry-fruit plants from the genus Capsicum, which are members of the nightshade family Solanaceae, cultivated for their pungency. Chili peppers are widely used in many cuisines as a spice to add "heat" to dishes. Capsaicin and the related capsaicinoids g... | Biology and health sciences | Solanales | null |
74240 | https://en.wikipedia.org/wiki/Anaphylaxis | Anaphylaxis | Anaphylaxis (Greek: 'up' + 'guarding') is a serious, potentially fatal allergic reaction and medical emergency that is rapid in onset and requires immediate medical attention regardless of the use of emergency medication on site. It typically causes more than one of the following: an itchy rash, throat closing due to... | Biology and health sciences | Specific diseases | Health |
74263 | https://en.wikipedia.org/wiki/Frame%20of%20reference | Frame of reference | In physics and astronomy, a frame of reference (or reference frame) is an abstract coordinate system, whose origin, orientation, and scale have been specified in physical space. It is based on a set of reference points, defined as geometric points whose position is identified both mathematically (with numerical coordin... | Physical sciences | Classical mechanics | null |
74327 | https://en.wikipedia.org/wiki/Principle%20of%20relativity | Principle of relativity | In physics, the principle of relativity is the requirement that the equations describing the laws of physics have the same form in all admissible frames of reference.
For example, in the framework of special relativity, the Maxwell equations have the same form in all inertial frames of reference. In the framework of g... | Physical sciences | Theory of relativity | null |
74331 | https://en.wikipedia.org/wiki/Andromeda%20Galaxy | Andromeda Galaxy | The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a D25 isophotal diameter of about and is approximately from Earth. The galaxy's name stems from the area of Eart... | Physical sciences | Notable galaxies | null |
74366 | https://en.wikipedia.org/wiki/Square%20metre | Square metre | The square metre (international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the unit of area in the International System of Units (SI) with symbol m2. It is the area of a square with sides one metre in length.
Adding and subtracting SI prefixes creates m... | Physical sciences | Area | Basics and measurement |
74390 | https://en.wikipedia.org/wiki/Decay%20product | Decay product | In nuclear physics, a decay product (also known as a daughter product, daughter isotope, radio-daughter, or daughter nuclide) is the remaining nuclide left over from radioactive decay. Radioactive decay often proceeds via a sequence of steps (decay chain). For example, 238U decays to 234Th which decays to 234mPa which... | Physical sciences | Nuclear physics | Physics |
74549 | https://en.wikipedia.org/wiki/Pomegranate | Pomegranate | The pomegranate (Punica granatum) is a fruit-bearing deciduous shrub in the family Lythraceae, subfamily Punicoideae, that grows between tall. Rich in symbolic and mythological associations in many cultures, it is thought to have originated from Afghanistan and Iran before being introduced and exported to other parts ... | Biology and health sciences | Myrtales | null |
74553 | https://en.wikipedia.org/wiki/Dermatology | Dermatology | Dermatology is the branch of medicine dealing with the skin. It is a speciality with both medical and surgical aspects. A dermatologist is a specialist medical doctor who manages diseases related to skin, hair, nails, and some cosmetic problems.
Etymology
Attested in English in 1819, the word "dermatology" derives fro... | Biology and health sciences | Fields of medicine | null |
74555 | https://en.wikipedia.org/wiki/Acne | Acne | Acne (/ˈækni/ ACK-nee), also known as acne vulgaris, is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. Typical features of the condition include blackheads or whiteheads, pimples, oily skin, and possible scarring. It primarily affects skin with a relatively high n... | Biology and health sciences | Non-infectious disease | null |
74567 | https://en.wikipedia.org/wiki/Dynamic%20random-access%20memory | Dynamic random-access memory | Dynamic random-access memory (dynamic RAM or DRAM) is a type of random-access semiconductor memory that stores each bit of data in a memory cell, usually consisting of a tiny capacitor and a transistor, both typically based on metal–oxide–semiconductor (MOS) technology. While most DRAM memory cell designs use a capacit... | Technology | Volatile memory | null |
74591 | https://en.wikipedia.org/wiki/Osteopathy | Osteopathy | Osteopathy, unlike osteopathic medicine, which is a branch of the medical profession in the United States, is a pseudoscientific system of alternative medicine that emphasizes physical manipulation of the body's muscle tissue and bones. In most countries, practitioners of osteopathy are not medically trained and are re... | Biology and health sciences | Alternative and traditional medicine | Health |
74634 | https://en.wikipedia.org/wiki/Aileron | Aileron | An aileron (French for "little wing" or "fin") is a hinged flight control surface usually forming part of the trailing edge of each wing of a fixed-wing aircraft. Ailerons are used in pairs to control the aircraft in roll (or movement around the aircraft's longitudinal axis), which normally results in a change in fligh... | Technology | Aircraft components | null |
74748 | https://en.wikipedia.org/wiki/Glaucoma | Glaucoma | Glaucoma is a group of eye diseases that can lead to damage of the optic nerve. The optic nerve transmits visual information from the eye to the brain. Glaucoma may cause vision loss if left untreated. It has been called the "silent thief of sight" because the loss of vision usually occurs slowly over a long period of ... | Biology and health sciences | Disabilities | Health |
74800 | https://en.wikipedia.org/wiki/Torus | Torus | In geometry, a torus (: tori or toruses) is a surface of revolution generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanar with the circle. The main types of toruses include ring toruses, horn toruses, and spindle toruses. A ring torus is sometimes colloquially ref... | Mathematics | Three-dimensional space | null |
74819 | https://en.wikipedia.org/wiki/Pupil | Pupil | The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina. It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil. The ... | Biology and health sciences | Visual system | Biology |
74844 | https://en.wikipedia.org/wiki/Glasses | Glasses | Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
Glasses are typically used ... | Technology | Optical instruments | null |
74845 | https://en.wikipedia.org/wiki/Contact%20lens | Contact lens | Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used by over 150 million people worldwide, and they can be worn to correct vision or for cosmetic or therapeutic reasons. In 2010, the worldwide market for contact lenses was esti... | Technology | Optical instruments | null |
74941 | https://en.wikipedia.org/wiki/Body%20cavity | Body cavity | A body cavity is any space or compartment, or potential space, in an animal body. Cavities accommodate organs and other structures; cavities as potential spaces contain fluid.
The two largest human body cavities are the ventral body cavity, and the dorsal body cavity. In the dorsal body cavity the brain and spinal cor... | Biology and health sciences | External anatomy and regions of the body | Biology |
74964 | https://en.wikipedia.org/wiki/Gauss%27s%20law | Gauss's law | In physics (specifically electromagnetism), Gauss's law, also known as Gauss's flux theorem (or sometimes Gauss's theorem), is one of Maxwell's equations. It is an application of the divergence theorem, and it relates the distribution of electric charge to the resulting electric field.
Definition
In its integral form... | Physical sciences | Electrodynamics | Physics |
75005 | https://en.wikipedia.org/wiki/Emergency%20medical%20technician | Emergency medical technician | An emergency medical technician (often, more simply, EMT) is a medical professional that provides emergency medical services. EMTs are most commonly found serving on ambulances and in fire departments in the US and Canada, as full-time and some part-time departments require their firefighters to at least be EMT certifi... | Biology and health sciences | Health professionals | Health |
75006 | https://en.wikipedia.org/wiki/Paramedic | Paramedic | A paramedic is a healthcare professional trained in the medical model, whose main role has historically been to respond to emergency calls for medical help outside of a hospital. Paramedics work as part of the emergency medical services (EMS), most often in ambulances. They also have roles in emergency medicine, primar... | Biology and health sciences | Health professionals | Health |
75022 | https://en.wikipedia.org/wiki/Expansion%20card | Expansion card | In computing, an expansion card (also called an expansion board, adapter card, peripheral card or accessory card) is a printed circuit board that can be inserted into an electrical connector, or expansion slot (also referred to as a bus slot) on a computer's motherboard (see also backplane) to add functionality to a co... | Technology | Computer hardware | null |
75075 | https://en.wikipedia.org/wiki/Haloalkane | Haloalkane | The haloalkanes (also known as halogenoalkanes or alkyl halides) are alkanes containing one or more halogen substituents. They are a subset of the general class of halocarbons, although the distinction is not often made. Haloalkanes are widely used commercially. They are used as flame retardants, fire extinguishants, r... | Physical sciences | Organic compounds | null |
75089 | https://en.wikipedia.org/wiki/Racemic%20mixture | Racemic mixture | In chemistry, a racemic mixture or racemate () is one that has equal amounts of left- and right-handed enantiomers of a chiral molecule or salt. Racemic mixtures are rare in nature, but many compounds are produced industrially as racemates.
History
The first known racemic mixture was racemic acid, which Louis Pasteur ... | Physical sciences | Stereochemistry | Chemistry |
75110 | https://en.wikipedia.org/wiki/Biot%E2%80%93Savart%20law | Biot–Savart law | In physics, specifically electromagnetism, the Biot–Savart law ( or ) is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current.
The Biot–Savart law is fundamental to magnetostatics. I... | Physical sciences | Magnetostatics | Physics |
75367 | https://en.wikipedia.org/wiki/Non-Newtonian%20fluid | Non-Newtonian fluid | In physics and chemistry, a non-Newtonian fluid is a fluid that does not follow Newton's law of viscosity, that is, it has variable viscosity dependent on stress. In particular, the viscosity of non-Newtonian fluids can change when subjected to force. Ketchup, for example, becomes runnier when shaken and is thus a non-... | Physical sciences | Fluid mechanics | Physics |
75485 | https://en.wikipedia.org/wiki/Electrical%20discharge%20machining | Electrical discharge machining | Electrical discharge machining (EDM), also known as spark machining, spark eroding, die sinking, wire burning or wire erosion, is a metal
fabrication process whereby a desired shape is obtained by using electrical discharges (sparks). Material is removed from the work piece by a series of rapidly recurring current disc... | Technology | Metallurgy | null |
75654 | https://en.wikipedia.org/wiki/Hyperthermia | Hyperthermia | Hyperthermia, also known simply as overheating, is a condition in which an individual's body temperature is elevated beyond normal due to failed thermoregulation. The person's body produces or absorbs more heat than it dissipates. When extreme temperature elevation occurs, it becomes a medical emergency requiring immed... | Biology and health sciences | Types | Health |
19048 | https://en.wikipedia.org/wiki/Mass | Mass | Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particles, theoretically with the same amount of matter, have nonetheless different m... | Physical sciences | Physics | null |
19051 | https://en.wikipedia.org/wiki/Manganese | Manganese | Manganese is a chemical element; it has symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese was first isolated in the 1770s. It is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It imp... | Physical sciences | Chemical elements_2 | null |
19052 | https://en.wikipedia.org/wiki/Molybdenum | Molybdenum | Molybdenum is a chemical element; it has symbol Mo (from Neo-Latin molybdaenum) and atomic number 42. The name derived from Ancient Greek , meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating ... | Physical sciences | Chemical elements_2 | null |
19053 | https://en.wikipedia.org/wiki/Mineral | Mineral | In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.
The geological definition of mineral normally excludes compounds that occur only in living organisms. Howe... | Physical sciences | Earth science | null |
19054 | https://en.wikipedia.org/wiki/Marble | Marble | Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO3) or dolomite (CaMg(CO3)2) that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is typically not foliated (layered), although there are exceptions.
In geology, the term marble re... | Physical sciences | Petrology | null |
19159 | https://en.wikipedia.org/wiki/Mile | Mile | The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards. The statute mile was standardised between the Commonwealth... | Physical sciences | Length and distance | null |
19167 | https://en.wikipedia.org/wiki/Manuscript | Manuscript | A manuscript (abbreviated MS for singular and MSS for plural) was, traditionally, any document written by hand or typewritten, as opposed to mechanically printed or reproduced in some indirect or automated way. More recently, the term has come to be understood to further include any written, typed, or word-processed co... | Technology | Printing | null |
19192 | https://en.wikipedia.org/wiki/Mean | Mean | A mean is a quantity representing the "center" of a collection of numbers and is intermediate to the extreme values of the set of numbers. There are several kinds of means (or "measures of central tendency") in mathematics, especially in statistics. Each attempts to summarize or typify a given group of data, illustrati... | Mathematics | Statistics and probability | null |
19200 | https://en.wikipedia.org/wiki/Molecular%20biology | Molecular biology | Molecular biology is a branch of biology that seeks to understand the molecular basis of biological activity in and between cells, including biomolecular synthesis, modification, mechanisms, and interactions.
Though cells and other microscopic structures had been observed in living organisms as early as the 18th cent... | Biology and health sciences | Biology | null |
19319 | https://en.wikipedia.org/wiki/Myelin | Myelin | Myelin ( ) is a lipid-rich material that surrounds nerve cell axons to insulate them and increase the rate at which electrical impulses (called action potentials) pass along the axon. The myelinated axon can be likened to an electrical wire (the axon) with insulating material (myelin) around it. However, unlike the pla... | Biology and health sciences | Nervous system | Biology |
19322 | https://en.wikipedia.org/wiki/Mesozoic | Mesozoic | The Mesozoic Era is the era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Periods. It is characterized by the dominance of gymnosperms such as cycads, ginkgoaceae and araucarian conifers, and of archosaurian reptiles such as the dinosaurs; a hot greenhouse climate;... | Physical sciences | Geological periods | null |
19331 | https://en.wikipedia.org/wiki/Moon | Moon | The Moon is Earth's only natural satellite. It orbits at an average distance of , about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have synchronized the Moon's orbital period (lunar month) with its rotation period (lunar day) at 29.5 Earth days, causing the same side of the Moon to always f... | Physical sciences | Science and medicine | null |
19338 | https://en.wikipedia.org/wiki/Mountain%20range | Mountain range | A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have arisen from the same cause, usually an orogeny. Mountain ranges are formed by a v... | Physical sciences | Landforms | null |
19344 | https://en.wikipedia.org/wiki/March | March | March is the third month of the year in both the Julian and Gregorian calendars. Its length is 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of March. The March equinox on the 20 or 21 marks the astronomical beginning of spring in the Northern Hemisphere and the beg... | Technology | Months | null |
19345 | https://en.wikipedia.org/wiki/May | May | May is the fifth month of the year in the Julian and Gregorian calendars. Its length is 31 days.
May is a month of spring in the Northern Hemisphere, and autumn in the Southern Hemisphere. Therefore, May in the Southern Hemisphere is the seasonal equivalent of November in the Northern Hemisphere and vice versa. Late... | Technology | Months | null |
19356 | https://en.wikipedia.org/wiki/Mental%20disorder | Mental disorder | A mental disorder, also referred to as a mental illness, a mental health condition, or a psychiatric disability, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. A mental disorder is also characterized by a clinically significant disturbance in an individual's co... | Biology and health sciences | Illness and injury | null |
19372 | https://en.wikipedia.org/wiki/Minute | Minute | Minute is a unit of time defined as equal to 60 seconds.
One hour contains 60 minutes.
Although not a unit in the International System of Units (SI), the minute is accepted for use in the SI. The SI symbol for minutes is min (without a dot). The prime symbol is also sometimes used informally to denote minutes.
In the ... | Physical sciences | Time | null |
19374 | https://en.wikipedia.org/wiki/Model%20organism | Model organism | A model organism is a non-human species that is extensively studied to understand particular biological phenomena, with the expectation that discoveries made in the model organism will provide insight into the workings of other organisms. Model organisms are widely used to research human disease when human experimentat... | Biology and health sciences | Basics | null |
19391 | https://en.wikipedia.org/wiki/Midwifery | Midwifery | Midwifery is the health science and health profession that deals with pregnancy, childbirth, and the postpartum period (including care of the newborn), in addition to the sexual and reproductive health of women throughout their lives. In many countries, midwifery is a medical profession (special for its independent and... | Biology and health sciences | Health professionals | Health |
19446 | https://en.wikipedia.org/wiki/Magnetic%20resonance%20imaging | Magnetic resonance imaging | Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to form images of the organs in the body. MRI does not involve X-ray... | Technology | Imaging | null |
19447 | https://en.wikipedia.org/wiki/Group%20%28mathematics%29 | Group (mathematics) | In mathematics, a group is a set with an operation that associates an element of the set to every pair of elements of the set (as does every binary operation) and satisfies the following constraints: the operation is associative, it has an identity element, and every element of the set has an inverse element.
Many ma... | Mathematics | Algebra | null |
19528 | https://en.wikipedia.org/wiki/Mechanical%20engineering | Mechanical engineering | Mechanical engineering is the study of physical machines that may involve force and movement. It is an engineering branch that combines engineering physics and mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the eng... | Technology | Technology: General | null |
19544 | https://en.wikipedia.org/wiki/Microevolution | Microevolution | Microevolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the chan... | Biology and health sciences | Basics_4 | Biology |
19545 | https://en.wikipedia.org/wiki/MySQL | MySQL | MySQL () is an open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, and "SQL", the acronym for Structured Query Language. A relational database organizes data into one or more data tables in which data may be related to each... | Technology | Office and data management | null |
19553 | https://en.wikipedia.org/wiki/Microprocessor | Microprocessor | A microprocessor is a computer processor for which the data processing logic and control is included on a single integrated circuit (IC), or a small number of ICs. The microprocessor contains the arithmetic, logic, and control circuitry required to perform the functions of a computer's central processing unit (CPU). Th... | Technology | Computer hardware | null |
19555 | https://en.wikipedia.org/wiki/Molecule | Molecule | A molecule is a group of two or more atoms that are held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions that satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used... | Physical sciences | Chemistry | null |
19559 | https://en.wikipedia.org/wiki/Mechanics | Mechanics | Mechanics () is the area of physics concerned with the relationships between force, matter, and motion among physical objects. Forces applied to objects may result in displacements, which are changes of an object's position relative to its environment.
Theoretical expositions of this branch of physics has its origins ... | Physical sciences | Basics_10 | null |
19562 | https://en.wikipedia.org/wiki/Mandelbrot%20set | Mandelbrot set | The Mandelbrot set () is a two-dimensional set with a relatively simple definition that exhibits great complexity, especially as it is magnified. It is popular for its aesthetic appeal and fractal structures. The set is defined in the complex plane as the complex numbers for which the function does not diverge to inf... | Mathematics | Other | null |
19566 | https://en.wikipedia.org/wiki/Main-group%20element | Main-group element | In chemistry and atomic physics, the main group is the group of elements (sometimes called the representative elements) whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements. The main group includes the eleme... | Physical sciences | Periodic table | Chemistry |
19568 | https://en.wikipedia.org/wiki/Microscope | Microscope | A microscope () is a laboratory instrument used to examine objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope.
There are many types of microscopes, ... | Technology | Optical | null |
19583 | https://en.wikipedia.org/wiki/Monomer | Monomer | A monomer ( ; mono-, "one" + -mer, "part") is a molecule that can react together with other monomer molecules to form a larger polymer chain or three-dimensional network in a process called polymerization.
Classification
Chemistry classifies monomers by type, and two broad classes based on the type of polymer they for... | Physical sciences | Polymers | Chemistry |
19588 | https://en.wikipedia.org/wiki/Mitochondrion | Mitochondrion | A mitochondrion () is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate (ATP), which is used throughout the cell as a source of chemical energy. They were discovered by Alber... | Biology and health sciences | Organelles and other cell parts | null |
19589 | https://en.wikipedia.org/wiki/Minimax | Minimax | Minimax (sometimes Minmax, MM or saddle point) is a decision rule used in artificial intelligence, decision theory, game theory, statistics, and philosophy for minimizing the possible loss for a worst case (maximum loss) scenario. When dealing with gains, it is referred to as "maximin" – to maximize the minimum gain. O... | Mathematics | Game theory | null |
19594 | https://en.wikipedia.org/wiki/Missile | Missile | A missile is an airborne ranged weapon capable of self-propelled flight aided usually by a propellant, jet engine or rocket motor.
Historically, 'missile' referred to any projectile that is thrown, shot or propelled towards a target; this usage is still recognized today with any unguided jet- or rocket-propelled weapo... | Technology | Explosive weapons | null |
19595 | https://en.wikipedia.org/wiki/Mendelian%20inheritance | Mendelian inheritance | Mendelian inheritance (also known as Mendelism) is a type of biological inheritance following the principles originally proposed by Gregor Mendel in 1865 and 1866, re-discovered in 1900 by Hugo de Vries and Carl Correns, and later popularized by William Bateson. These principles were initially controversial. When Mende... | Biology and health sciences | Genetics and taxonomy | null |
19605 | https://en.wikipedia.org/wiki/Main%20sequence | Main sequence | In astronomy, the main sequence is a classification of stars which appear on plots of stellar color versus brightness as a continuous and distinctive band. Stars on this band are known as main-sequence stars or dwarf stars, and positions of stars on and off the band are believed to indicate their physical properties, a... | Physical sciences | Stellar astronomy | null |
19614 | https://en.wikipedia.org/wiki/Molecular%20orbital | Molecular orbital | In chemistry, a molecular orbital () is a mathematical function describing the location and wave-like behavior of an electron in a molecule. This function can be used to calculate chemical and physical properties such as the probability of finding an electron in any specific region. The terms atomic orbital and molecul... | Physical sciences | Molecular physics | null |
19622 | https://en.wikipedia.org/wiki/Materials%20science | Materials science | Materials science is an interdisciplinary field of researching and discovering materials. Materials engineering is an engineering field of finding uses for materials in other fields and industries.
The intellectual origins of materials science stem from the Age of Enlightenment, when researchers began to use analytica... | Physical sciences | Chemistry: General | null |
19636 | https://en.wikipedia.org/wiki/Mathematical%20logic | Mathematical logic | Mathematical logic is the study of formal logic within mathematics. Major subareas include model theory, proof theory, set theory, and recursion theory (also known as computability theory). Research in mathematical logic commonly addresses the mathematical properties of formal systems of logic such as their expressive ... | Mathematics | Discrete mathematics | null |
19638 | https://en.wikipedia.org/wiki/MEMS | MEMS | MEMS (micro-electromechanical systems) is the technology of microscopic devices incorporating both electronic and moving parts. MEMS are made up of components between 1 and 100 micrometres in size (i.e., 0.001 to 0.1 mm), and MEMS devices generally range in size from 20 micrometres to a millimetre (i.e., 0.02 to 1.0 mm... | Technology | Machinery and tools: General | null |
19662 | https://en.wikipedia.org/wiki/Mean%20value%20theorem | Mean value theorem | In mathematics, the mean value theorem (or Lagrange's mean value theorem) states, roughly, that for a given planar arc between two endpoints, there is at least one point at which the tangent to the arc is parallel to the secant through its endpoints. It is one of the most important results in real analysis. This theore... | Mathematics | Real analysis | null |
19673 | https://en.wikipedia.org/wiki/MP3 | MP3 | MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany under the lead of Karlheinz Brandenburg. It was designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduct... | Technology | File formats | null |
19690 | https://en.wikipedia.org/wiki/Machine%20gun | Machine gun | A machine gun (MG) is a fully automatic and rifled firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) are typically designed more for firing short bursts rather than continuous firepower ... | Technology | Projectile weapons | null |
19694 | https://en.wikipedia.org/wiki/Mercury%20%28planet%29 | Mercury (planet) | Mercury is the first planet from the Sun and the smallest in the Solar System. In English, it is named after the ancient Roman god (Mercury), god of commerce and communication, and the messenger of the gods. Mercury is classified as a terrestrial planet, with roughly the same surface gravity as Mars. The surface of Me... | Physical sciences | Astronomy | null |
19702 | https://en.wikipedia.org/wiki/Mutation | Mutation | In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. Viral genomes contain either DNA or RNA. Mutations result from errors during DNA or viral replication, mitosis, or meiosis or other types of damage to DNA (such as pyrimidine dimers caused ... | Biology and health sciences | Evolution | null |
19712 | https://en.wikipedia.org/wiki/Methanol | Methanol | Methanol (also called methyl alcohol and wood spirit, amongst other names) is an organic chemical compound and the simplest aliphatic alcohol, with the chemical formula (a methyl group linked to a hydroxyl group, often abbreviated as MeOH). It is a light, volatile, colorless and flammable liquid with a distinctive alc... | Physical sciences | Carbon–oxygen bond | null |
19716 | https://en.wikipedia.org/wiki/Magnetism | Magnetism | Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, magnetism is one of two aspects of electromagnetism.
The most familiar effec... | Physical sciences | Physics | null |
19719 | https://en.wikipedia.org/wiki/Filter%20%28mathematics%29 | Filter (mathematics) | In mathematics, a filter or order filter is a special subset of a partially ordered set (poset), describing "large" or "eventual" elements. Filters appear in order and lattice theory, but also topology, whence they originate. The notion dual to a filter is an order ideal.
Special cases of filters include ultrafilters,... | Mathematics | Order theory | null |
19722 | https://en.wikipedia.org/wiki/Metallurgy | Metallurgy | Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys.
Metallurgy encompasses both the science and the technology of metals, including the production of metals and t... | Technology | Materials | null |
19737 | https://en.wikipedia.org/wiki/Maxwell%27s%20equations | Maxwell's equations | Maxwell's equations, or Maxwell–Heaviside equations, are a set of coupled partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, electric and magnetic circuits.
The equations provide a mathematical model for electric, optical, and ... | Physical sciences | Electrodynamics | null |
19769 | https://en.wikipedia.org/wiki/Mariculture | Mariculture | Mariculture, sometimes called marine farming or marine aquaculture, is a branch of aquaculture involving the cultivation of marine organisms for food and other animal products, in seawater. Subsets of it include (offshore mariculture), fish farms built on littoral waters (inshore mariculture), or in artificial tanks, ... | Technology | Aquaculture | null |
19812 | https://en.wikipedia.org/wiki/Project%20Mercury | Project Mercury | Project Mercury was the first human spaceflight program of the United States, running from 1958 through 1963. An early highlight of the Space Race, its goal was to put a man into Earth orbit and return him safely, ideally before the Soviet Union. Taken over from the US Air Force by the newly created civilian space agen... | Technology | Programs and launch sites | null |
19823 | https://en.wikipedia.org/wiki/Maya%20numerals | Maya numerals | The Mayan numeral system was the system to represent numbers and calendar dates in the Maya civilization. It was a vigesimal (base-20) positional numeral system. The numerals are made up of three symbols: zero (a shell), one (a dot) and five (a bar). For example, thirteen is written as three dots in a horizontal row ab... | Mathematics | Basics | null |
19830 | https://en.wikipedia.org/wiki/Maxwell%E2%80%93Boltzmann%20distribution | Maxwell–Boltzmann distribution | In physics (in particular in statistical mechanics), the Maxwell–Boltzmann distribution, or Maxwell(ian) distribution, is a particular probability distribution named after James Clerk Maxwell and Ludwig Boltzmann.
It was first defined and used for describing particle speeds in idealized gases, where the particles move... | Physical sciences | Statistical mechanics | Physics |
19833 | https://en.wikipedia.org/wiki/Metastability | Metastability | In chemistry and physics, metastability is an intermediate energetic state within a dynamical system other than the system's state of least energy.
A ball resting in a hollow on a slope is a simple example of metastability. If the ball is only slightly pushed, it will settle back into its hollow, but a stronger push ma... | Physical sciences | Physics basics: General | Physics |
19838 | https://en.wikipedia.org/wiki/Metallic%20bonding | Metallic bonding | Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions. It may be described as the sharing of free electrons among a structure of positively charged ions... | Physical sciences | Chemical bonds | null |
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