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Glossary · Nouns · M

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TermTypeDefinitionClassificationsUpdated
Microbiologynounthe branch of biology that studies microorganisms and their effects on humansverifiedMay 18, 2026
Microbrachianounabnormally small armsverifiedMay 18, 2026
Microbrewerynouna small breweryverifiedMay 18, 2026
Microcephalusnounan abnormally small head and underdeveloped brainverifiedMay 18, 2026
Microcephalynounan abnormally small head and underdeveloped brainverifiedMay 18, 2026
Microchipnounelectronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuitverifiedMay 18, 2026
Microcircuitnouna microelectronic computer circuit incorporated into a chip or semiconductorverifiedMay 18, 2026
Microcodenoun(computer science) coded instructions that are stored permanently in read-only memoryverifiedMay 18, 2026
Microcomputernouna small digital computer based on a microprocessor and designed to be used by one person at a timeverifiedMay 18, 2026
Microcosmnouna miniature model of somethingverifiedMay 18, 2026
Microcosmic SaltnounMWEa white salt present in urine and used to test for metal oxidesverifiedMay 18, 2026
Microcytenounan abnormally small red blood cell (less than 5 microns in diameter)verifiedMay 18, 2026
Microcytic AnaemianounMWEanemia in which the average size of erythrocytes is smaller than normalverifiedMay 18, 2026
Microcytic AnemianounMWEanemia in which the average size of erythrocytes is smaller than normalverifiedMay 18, 2026
Microcytosisnouna blood disorder characterized by the presence of microcytes (abnormally small red blood cells) in the bloodverifiedMay 18, 2026
Microdotnounphotograph reduced to the size of a dot (usually for purposes of security)verifiedMay 18, 2026
Microeconomic ExpertnounMWEan economist who specializes in microeconomicsverifiedMay 18, 2026
Microeconomicsnounthe branch of economics that studies the economy of consumers or households or individual firmsverifiedMay 18, 2026
Microeconomistnounan economist who specializes in microeconomicsverifiedMay 18, 2026
Microelectronicsnounthe branch of electronics that deals with miniature componentsverifiedMay 18, 2026
Microevolutionnounevolution resulting from small specific genetic changes that can lead to a new subspeciesverifiedMay 18, 2026
Microfaradnouna unit of capacitance equal to one millionth of a faradverifiedMay 18, 2026
Microfichenounsmall sheet of microfilm on which many pages of material have been photographedverifiedMay 18, 2026
Microfloranounmicroscopic plantsverifiedMay 18, 2026
Microfossilnouna fossil that must be studied microscopicallyverifiedMay 18, 2026
Microgametophytenounthe male gametophyte produced by a microsporeverifiedMay 18, 2026
Microgaussnouna unit of magnetic flux density equal to one millionth of a gaussverifiedMay 18, 2026
Microglianounneuroglial tissue of mesodermal origin that can become phagocyticverifiedMay 18, 2026
Microgliacytenouna cell of the microglia that may become phagocytic and collect waste products of nerve tissueverifiedMay 18, 2026
Microgramnounone millionth (1/1,000,000) gramverifiedMay 18, 2026
Micrometeornouna meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphereverifiedMay 18, 2026
Micrometeoritenouna meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphereverifiedMay 18, 2026
Micrometeoroidnouna meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphereverifiedMay 18, 2026
Micrometernouna metric unit of length equal to one millionth of a meterverifiedMay 18, 2026
Micrometer CalipernounMWEcaliper for measuring small distancesverifiedMay 18, 2026
Micrometer GaugenounMWEcaliper for measuring small distancesverifiedMay 18, 2026
Micrometrynounmeasuring with a micrometerverifiedMay 18, 2026
Micromicronnouna metric unit of length equal to one trillionth of a meterverifiedMay 18, 2026
Micromillimeternouna metric unit of length equal to one billionth of a meterverifiedMay 18, 2026
Micromillimetrenouna metric unit of length equal to one billionth of a meterverifiedMay 18, 2026
Micronnouna metric unit of length equal to one millionth of a meterverifiedMay 18, 2026
Micronutrientnouna substance needed only in small amounts for normal body function (e.g., vitamins or minerals)verifiedMay 18, 2026
Microorganismnounany organism of microscopic sizeverifiedMay 18, 2026
Micropaleontologynounthe paleontology of microfossilsverifiedMay 18, 2026
Micropenisnounan abnormally small penisverifiedMay 18, 2026
Microphagenouna neutrophil that ingests small things (as bacteria)verifiedMay 18, 2026
Microphallusnounan abnormally small penisverifiedMay 18, 2026
Microphonenoundevice for converting sound waves into electrical energyverifiedMay 18, 2026
Microphone BoomnounMWEa pole carrying an overhead microphone projected over a film or tv setverifiedMay 18, 2026
Microphoningnounthe transduction of sound waves into electrical waves by a microphoneverifiedMay 18, 2026
Microphotometernounspecial kind of densitometer that measures density variations over a very small areaverifiedMay 18, 2026
Microprocessornounintegrated circuit semiconductor chip that performs the bulk of the processing and controls the parts of a systemverifiedMay 18, 2026
Microprocessor ChipnounMWEelectronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuitverifiedMay 18, 2026
Micropylenounminute opening in the wall of an ovule through which the pollen tube entersverifiedMay 18, 2026
Microradiannouna unit of angular distance equal to one thousandth of a milliradianverifiedMay 18, 2026
Microscopenounmagnifier of the image of small objectsverifiedMay 18, 2026
Microscope SlidenounMWEa small flat rectangular piece of glass on which specimens can be mounted for microscopic studyverifiedMay 18, 2026
Microscope StagenounMWEa small platform on a microscope where the specimen is mounted for examinationverifiedMay 18, 2026
Microscopic AnatomynounMWEthe study of microscopic structures of tissues and organsverifiedMay 18, 2026
Microscopic FieldnounMWEthe areas that is visible through a microscopeverifiedMay 18, 2026
Microscopistnouna scientist who specializes in research with the use of microscopesverifiedMay 18, 2026
Microscopynounresearch with the use of microscopesverifiedMay 18, 2026
Microsecondnounone millionth (10^-6) of a secondverifiedMay 18, 2026
Microseismnouna small earthquakeverifiedMay 18, 2026
Microsomenouna tiny granule in the cytoplasm that is where protein synthesis takes place under the direction of mRNAverifiedMay 18, 2026
Microsporangiumnouna plant structure that produces microsporesverifiedMay 18, 2026
Microsporenounsmaller of the two types of spore produced in heterosporous plantsverifiedMay 18, 2026
Microsporidiannounparasite of arthropods and fishes that invade and destroy host cellsverifiedMay 18, 2026
Microsporophyllnounin non-flowering plants, a sporophyll that bears only microsporangiaverifiedMay 18, 2026
Microsurgerynounsurgery using operating microscopes and miniaturized precision instruments to perform intricate procedures on very small structuresverifiedMay 18, 2026
Microtomenounscientific instrument that cuts thin slices of something for microscopic examinationverifiedMay 18, 2026
Microtubulenouna microscopically small tubuleverifiedMay 18, 2026
Microvoltnouna unit of potential equal to one millionth of a voltverifiedMay 18, 2026
Microwave BombnounMWEa bomb that explodes in midair and releases a massive burst of electromagnetic energy sufficient to disable computers and telecommunications without killing people or damaging buildingsverifiedMay 18, 2026
Microwave Diathermy MachinenounMWEdiathermy machine that uses microwave radiation as the source of heatverifiedMay 18, 2026
Microwave Linear AcceleratornounMWElinear accelerator that uses microwavesverifiedMay 18, 2026
Microwave OvennounMWEkitchen appliance that cooks food by passing an electromagnetic wave through itverifiedMay 18, 2026
Microwave RadarnounMWEmeasuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objectsverifiedMay 18, 2026
Microwave SpectroscopynounMWEthe use of spectroscopy to study atomic or molecular resonances in the microwave spectrumverifiedMay 18, 2026
Microwave SpectrumnounMWEthe part of the electromagnetic spectrum corresponding to microwavesverifiedMay 18, 2026
Microwave technologynounMWENarrowband technology that requires a direct line-of-sight to transmit voice and data communications and is used to integrate a broad range of fixed and mobile communication networks.NetworkMay 12, 2026
Micturitionnounthe discharge of urineverifiedMay 18, 2026
Micturition ReflexnounMWErelaxation of the urethral sphincter in response to increased pressure in the bladderverifiedMay 18, 2026
Mid-Calfnounthe middle of the calfverifiedMay 18, 2026
Mid-Eightiesnounthe time of life between 80 and 90verifiedMay 18, 2026
Mid-Fiftiesnounthe time of life between 50 and 60verifiedMay 18, 2026
Mid-Fortiesnounthe time of life between 40 and 50verifiedMay 18, 2026
Mid-Ninetiesnounthe time of life between 90 and 100verifiedMay 18, 2026
Mid-Octobernounthe middle part of OctoberverifiedMay 18, 2026
Mid-Offnounthe fielding position in cricket closest to the bowler on the off sideverifiedMay 18, 2026
Mid-Onnounthe fielding position in cricket closest to the bowler on the on sideverifiedMay 18, 2026
Mid-Septembernounthe middle part of SeptemberverifiedMay 18, 2026
Mid-Seventiesnounthe time of life between 70 and 80verifiedMay 18, 2026
Mid-Sixtiesnounthe time of life between 60 and 70verifiedMay 18, 2026
Mid-Twentiesnounthe time of life in the middle of a person's third decade, after their early twenties and before their late twentiesverifiedMay 18, 2026
Mid-Waternounthe water that is well below the surface but also well above the bottomverifiedMay 18, 2026
Midafternoonnounthe middle part of the afternoonverifiedMay 18, 2026
Midairnounsome point in the airverifiedMay 18, 2026
Midazolamnounan injectable form of benzodiazepine (trade name Versed) useful for sedation and for reducing pain during uncomfortable medical proceduresverifiedMay 18, 2026
Midbrainnounthe middle portion of the brainverifiedMay 18, 2026