Glossary · Nouns · M
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TermTypeDefinitionClassificationsUpdated
Meristemnounundifferentiated tissue from which new cells are formed, as at the tip of a stem or rootverified
Merit PaynounMWEextra pay awarded to an employee on the basis of merit, especially to school teachersverified
Merit SystemnounMWEthe system of employing and promoting civil servants on the basis of abilityverified
Meritocracynounthe belief that rulers should be chosen for their superior abilities and not because of their wealth or birthverified
Merozoitenouna cell that arises from the asexual division of a parent sporozoan during its life cycleverified
Merry BellsnounMWEany of various plants of the genus Uvularia having yellowish drooping bell-shaped flowersverified
Merry-Go-Roundnouna never-ending cycle of activities and events (especially when they seem to have little purpose)verified
Mescalnouna colorless Mexican liquor distilled from fermented juices of certain desert plants of the genus Agavaceae (especially the century plant)verified
Mescal BeannounMWEshrub or small tree having pinnate leaves poisonous to livestock and dense racemes of intensely fragrant blue flowers and red beansverified
Mesenteric ArterynounMWEone of two branches of the aorta that pass between the two layers of the mesentery to the intestinesverified
Mesenteric VeinnounMWEa tributary of the portal vein passing from the intestine between the two layers of mesenteryverified
Mesenterynouna double layer of peritoneum that attaches to the back wall of the abdominal cavity and supports the small intestinesverified
Mesh TopologynounMWEthe topology of a network whose components are all connected directly to every other componentverified
Mesne LordnounMWEa feudal lord who was lord to his own tenants on land held from a superior lordverified
Mesoblastnounthe middle germ layer that develops into muscle and bone and cartilage and blood and connective tissueverified
Mesodermnounthe middle germ layer that develops into muscle and bone and cartilage and blood and connective tissueverified
Mesquitnounany of several small spiny trees or shrubs of the genus Prosopis having small flowers in axillary cylindrical spikes followed by large pods rich in sugarverified
Mesquitenounany of several small spiny trees or shrubs of the genus Prosopis having small flowers in axillary cylindrical spikes followed by large pods rich in sugarverified
Message authentication codenounMWEA cryptographic checksum on data that uses a symmetric key to detect both accidental and intentional modifications of the data. MACs provide authenticity and integrity protection, but not non-repudiation protection.Control
Message digestnounMWEA digital signature that uniquely identifies data and has the property that changing a single bit in the data will cause a completely different message digest to be generated.Data
Message digest algorithmnounMWEMessage digest algorithms are SHA1, MD2, MD4 and MD5. These algorithms are one-way functions unlike private and public key encryption algorithms. Scope Note: All digest algorithms take a message of arbitrary length and produce a 128-bit message digest.Capability
Message ExternalsnounMWEInformation outside of the message text, such as the header, trailer, etc.Data
Message IndicatornounMWESequence of bits transmitted over a communications system for synchronizing cryptographic equipment.DataRegulatedCUI
Messmatenoun(nautical) an associate with whom you share meals in the same mess (as on a ship)verified
Messuagenoun(law) a dwelling house and its adjacent buildings and the adjacent land used by the householdverified
Mestizanouna woman of mixed racial ancestry (especially mixed European and Native American ancestry)verified
Mestizonouna person of mixed racial ancestry (especially mixed European and Native American ancestry)verified
Mestranolnouna synthetic form of estrogen used in combination with a progestin in oral contraceptivesverified
Metabolic AcidosisnounMWEacidosis and bicarbonate concentration in the body fluids resulting either from the accumulation of acids or the abnormal loss of bases from the body (as in diarrhea or renal disease)verified
Metabolic AlkalosisnounMWEalkalosis resulting from hydrogen-ion loss or excessive intake of alkaline substancesverified
Metabolic ProcessnounMWEthe organic processes (in a cell or organism) that are necessary for lifeverified
Metabolismnounthe marked and rapid transformation of a larva into an adult that occurs in some animalsverified
Metabolitenounany substance involved in metabolism (either as a product of metabolism or as necessary for metabolism)verified
Metacenternoun(shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one sideverified
Metacentrenoun(shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one sideverified
Metacentric ChromosomenounMWEa chromosome having two equal arms because the centromere is in median positionverified