Glossary · Nouns · M
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TermTypeDefinitionClassificationsUpdated
Metallic BondnounMWEa chemical bond in which electrons are shared over many nuclei and electronic conduction occursverified
Metallic ElementnounMWEany of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.verified
Metallurgical EngineernounMWEan engineer trained in the extraction and refining and alloying and fabrication of metalsverified
Metallurgistnounan engineer trained in the extraction and refining and alloying and fabrication of metalsverified
Metalworkernounsomeone who works metal (especially by hammering it when it is hot and malleable)verified
Metamerenounone of a series of similar body segments into which some animals are divided longitudinallyverified
Metamorphismnounchange in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substancesverified
Metamorphosisnounthe marked and rapid transformation of a larva into an adult that occurs in some animalsverified
Metaphornouna figure of speech in which an expression is used to refer to something that it does not literally denote in order to suggest a similarityverified
Metaplastic AnaemianounMWEpernicious anemia in which the various formed elements in the blood are changedverified
Metaplastic AnemianounMWEpernicious anemia in which the various formed elements in the blood are changedverified
Metasequoianounlarge fast-growing Chinese monoecious tree having flat bright-green deciduous leaves and small globular conesverified
Metastabilitynounthe quality of a physical system that persists in its existing equilibrium when undisturbed (or only slightly disturbed) but able to pass to a more stable equilibrium when sufficiently disturbedverified
Metastatic TumornounMWEa tumor that is malignant and tends to spread to other parts of the bodyverified
Metatarsal VeinnounMWEdorsal and plantar branches of veins serving the metatarsal region of the footverified
Metathesisnouna chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB)verified
Metempsychosisnounafter death the soul begins a new cycle of existence in another human bodyverified
Meteornouna streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explodeverified
Meteor ShowernounMWEa transient shower of meteors when a meteor swarm enters the earth's atmosphereverified
Meteor StreamnounMWEa transient shower of meteors when a meteor swarm enters the earth's atmosphereverified
Meteoritenounstony or metallic object that is the remains of a meteoroid that has reached the earth's surfaceverified
Meteoroidnoun(astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphereverified
Meteorological BalloonnounMWEa small unmanned balloon set aloft to observe atmospheric conditionsverified
Meteorological ConditionsnounMWEthe prevailing environmental conditions as they influence the prediction of weatherverified
Meteorological Observation PostnounMWEone of a network of observation posts where meteorological data is recordedverified
Meteorological SatellitenounMWEa satellite that transmits frequent picture of the earth belowverified
Meteorologistnouna specialist who studies processes in the earth's atmosphere that cause weather conditionsverified
Meteorologynounthe earth science dealing with phenomena of the atmosphere, especially weatherverified
Meter ReadingnounMWEa datum about some physical state that is presented to a user by a meter or similar instrumentverified
Metforminnounan antidiabetic drug (trade name Glucophage) prescribed to treat type II diabetesverified
Methnounan amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochlorideverified
Methacholinenounparasympathomimetic drug (trademark Mecholyl) that stimulates secretions and smooth muscle activityverified
Methadone HydrochloridenounMWEsynthetic narcotic drug similar to morphine but less habit-formingverified
Methamphetaminenounan amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochlorideverified
Methamphetamine HydrochloridenounMWEan amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochlorideverified
Methane SeriesnounMWEa series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)verified
Methanogennounarchaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methaneverified
Methapyrilenenounantihistamine used to treat allergic responses (as rhinitis or dermatitis or pruritus)verified
Methenaminenounantibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infectionsverified
Methicillinnounantibiotic drug of the penicillin family used in the treatment of certain staphylococcal infectionsverified
Methocarbamolnounmuscle relaxant for skeletal muscles (trade name Robaxin) used to treat spasmsverified
Method ActingnounMWEan acting technique introduced by Stanislavsky in which the actor recalls emotions or reactions from his or her own life and uses them to identify with the character being portrayedverified
Method of AccountingnounMWEa bookkeeper's chronological list of related debits and credits of a businessverified
Method of FluxionsnounMWEthe part of calculus that deals with the variation of a function with respect to changes in the independent variable (or variables) by means of the concepts of derivative and differentialverified
Method of Least SquaresnounMWEa method of fitting a curve to data points so as to minimize the sum of the squares of the distances of the points from the curveverified