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Glossary · Nouns · M

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TermTypeDefinitionClassificationsUpdated
Muttonheadnouna stupid personverifiedMay 18, 2026
Mutual AffectionnounMWEsympathy of each person for the otherverifiedMay 18, 2026
Mutual AidnounMWEarrangements made between nations to assist each otherverifiedMay 18, 2026
Mutual AuthenticationnounMWEOccurs when parties at both ends of a communication activity authenticate each other.ControlMay 9, 2026
Mutual ExclusivenessnounMWEthe relation between propositions that cannot both be true at the same timeverifiedMay 18, 2026
Mutual FundnounMWEa regulated investment company with a pool of assets that regularly sells and redeems its sharesverifiedMay 18, 2026
Mutual Fund CompanynounMWEa regulated investment company with a pool of assets that regularly sells and redeems its sharesverifiedMay 18, 2026
Mutual InductancenounMWEa measure of the induction between two circuitsverifiedMay 18, 2026
Mutual InductionnounMWEgeneration of electromotive forces in each other by two adjacent circuitsverifiedMay 18, 2026
Mutual OppositionnounMWEa relation between two opposite attributes or tendenciesverifiedMay 18, 2026
Mutual ResemblancenounMWEsymmetrical resemblanceverifiedMay 18, 2026
Mutual Savings BanknounMWEa state-chartered savings bank owned by its depositors and managed by a board of trusteesverifiedMay 18, 2026
Mutual SuspicionnounMWECondition in which two information systems need to rely upon each other to perform a service, yet neither trusts the other to properly protect shared data.ThreatMay 9, 2026
Mutual UnderstandingnounMWEsympathy of each person for the otherverifiedMay 18, 2026
Mutualismnounthe relation between two different species of organisms that are interdependentverifiedMay 18, 2026
Mutualitynouna reciprocal relation between interdependent entities (objects or individuals or groups)verifiedMay 18, 2026
Mutualnessnouna reciprocality of sentimentsverifiedMay 18, 2026
Muumuunouna woman's loose unbelted dressverifiedMay 18, 2026
Muzhiknouna Russian peasant (especially prior to 1917)verifiedMay 18, 2026
Muzjiknouna Russian peasant (especially prior to 1917)verifiedMay 18, 2026
Muzzle LoadernounMWEan obsolete firearm that was loaded through the muzzleverifiedMay 18, 2026
Muzzle VelocitynounMWEthe velocity of a projectile as it leaves the muzzle of a gunverifiedMay 18, 2026
Muzzlernounsomeone who muzzles animalsverifiedMay 18, 2026
Mvnouna unit of potential equal to one thousandth of a voltverifiedMay 18, 2026
MVPnounthe player judged to be the most important to the sportverifiedMay 18, 2026
Myalgianounpain in a muscle or group of musclesverifiedMay 18, 2026
Myasthenianouna chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck)verifiedMay 18, 2026
Myasthenia GravisnounMWEa chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck)verifiedMay 18, 2026
Myasthenic SyndromenounMWEa disease seen in patients with lung cancer and characterized by weakness and fatigue of hip and thigh muscles and an aching backverifiedMay 18, 2026
Myceliumnounthe vegetative part of a fungus consisting of a mass of branching threadlike hyphaeverifiedMay 18, 2026
Mycobacteriumnounrod-shaped bacteria some saprophytic or causing diseasesverifiedMay 18, 2026
Mycologistnouna botanist who specializes in the study of fungiverifiedMay 18, 2026
Mycologynounthe branch of botany that studies fungi and fungus-caused diseasesverifiedMay 18, 2026
Mycomycinnouna highly unsaturated antibiotic acid obtained from an actinomyceteverifiedMay 18, 2026
Mycophagenouna person or animal who eats fungi (especially mushrooms)verifiedMay 18, 2026
Mycophagistnouna person or animal who eats fungi (especially mushrooms)verifiedMay 18, 2026
Mycophagynounthe practice of eating fungi, especially mushrooms collected in the wildverifiedMay 18, 2026
Mycoplasmanounany of a group of small parasitic bacteria that lack cell walls and can survive without oxygenverifiedMay 18, 2026
Mycoplasmal PneumonianounMWEan acute respiratory disease marked by high fever and coughingverifiedMay 18, 2026
Mycosisnounan inflammatory condition caused by a fungusverifiedMay 18, 2026
Mycotoxinnouna toxin produced by a fungusverifiedMay 18, 2026
Mydriasisnounreflex pupillary dilation as a muscle pulls the iris outwardverifiedMay 18, 2026
Mydriaticnouna drug that causes the pupil of the eye to dilateverifiedMay 18, 2026
Mydriatic DrugnounMWEa drug that causes the pupil of the eye to dilateverifiedMay 18, 2026
Myelatelianounany developmental defect of the spinal cordverifiedMay 18, 2026
Myelencephalonnounthe posterior part of the hindbrain in developing vertebratesverifiedMay 18, 2026
Myelinnouna white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibersverifiedMay 18, 2026
Myelin SheathnounMWEa layer of myelin encasing (and insulating) the axons of medullated nerve fibersverifiedMay 18, 2026
Myelinated Nerve FibernounMWEa nerve fiber encased in a sheath of myelinverifiedMay 18, 2026
Myelinenouna white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibersverifiedMay 18, 2026
Myelinisationnounthe development of a myelin sheath around a nerve fiberverifiedMay 18, 2026
Myelinizationnounthe development of a myelin sheath around a nerve fiberverifiedMay 18, 2026
Myelitisnouninflammation of the spinal cordverifiedMay 18, 2026
Myeloblastnouna precursor of leukocytes that normally occurs only in bone marrowverifiedMay 18, 2026
Myeloblastic LeukemianounMWEa malignant neoplasm of blood-forming tissuesverifiedMay 18, 2026
Myelocytenounan immature leukocyte normally found in bone marrowverifiedMay 18, 2026
Myelocytic LeukemianounMWEa malignant neoplasm of blood-forming tissuesverifiedMay 18, 2026
Myelofibrosisnounfibrosis of the bone marrowverifiedMay 18, 2026
MyelogramnounX-ray film of the spinal cord and spinal nerve roots and subarachnoid spaceverifiedMay 18, 2026
Myelographynounroentgenography of the spinal cord to detect possible lesions (usually after injection of a contrast medium into the subarachnoid space)verifiedMay 18, 2026
Myeloid LeukemianounMWEchronic leukemia characterized by granular leukocytesverifiedMay 18, 2026
Myelomanouna tumor of the bone marrow (usually malignant) composed of cells normally found in bone marrowverifiedMay 18, 2026
Myelomeningocelenouna congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral columnverifiedMay 18, 2026
Myenteric PlexusnounMWEa plexus of unmyelinated fibers and postganglionic autonomic cell bodies in the muscular coat of the esophagus and stomach and intestinesverifiedMay 18, 2026
Mygnounone ten thousandth of a centnerverifiedMay 18, 2026
Myiasisnouninfestation of the body by the larvae of flies (usually through a wound or other opening) or any disease resulting from such infestationverifiedMay 18, 2026
Mylarnouna thin polyester filmverifiedMay 18, 2026
Mylodonnounlarge (bear-sized) extinct edentate mammal of the Pleistocene in South AmericaverifiedMay 18, 2026
Mylodontidnouna variety of extinct edentateverifiedMay 18, 2026
Mymnouna metric unit of length equal to 10,000 metersverifiedMay 18, 2026
Mynanountropical Asian starlingsverifiedMay 18, 2026
Myna BirdnounMWEtropical Asian starlingsverifiedMay 18, 2026
Mynahnountropical Asian starlingsverifiedMay 18, 2026
Mynah BirdnounMWEtropical Asian starlingsverifiedMay 18, 2026
Myocardial InfarctionnounMWEa sudden and severe instance of abnormal heart function resulting from the lack of blood flow to a part of the heartverifiedMay 18, 2026
Myocardiopathynouna disorder (usually of unknown origin) of the heart muscle (myocardium)verifiedMay 18, 2026
Myocarditisnouninflammation of the myocardium (the muscular tissue of the heart)verifiedMay 18, 2026
Myocardiumnounthe middle muscular layer of the heart wallverifiedMay 18, 2026
Myoclonusnouna clonic spasm of a muscle or muscle groupverifiedMay 18, 2026
Myoclonus EpilepsynounMWEepilepsy characterized by clonus of muscle groups and progressive mental deterioration and genetic originverifiedMay 18, 2026
Myodynianounpain in a muscle or group of musclesverifiedMay 18, 2026
Myofibrilnounone of many contractile filaments that make up a striated muscle fiberverifiedMay 18, 2026
Myofibrillanounone of many contractile filaments that make up a striated muscle fiberverifiedMay 18, 2026
Myoglobinnouna hemoprotein that receives oxygen from hemoglobin and stores it in the tissues until neededverifiedMay 18, 2026
Myoglobinurianounthe presence of myoglobin in the urineverifiedMay 18, 2026
Myogramnouna graphical recording of muscle activityverifiedMay 18, 2026
Myologynounthe branch of physiology that studies musclesverifiedMay 18, 2026
Myomanouna benign tumor composed of muscle tissueverifiedMay 18, 2026
Myometritisnouninflammation of the myometriumverifiedMay 18, 2026
Myometriumnounthe smooth muscle forming the wall of the uterusverifiedMay 18, 2026
Myonecrosisnounlocalized death of muscle cell fibersverifiedMay 18, 2026
Myoneural JunctionnounMWEthe junction between a nerve fiber and the muscle it suppliesverifiedMay 18, 2026
Myopathynounany pathology of the muscles that is not attributable to nerve dysfunctionverifiedMay 18, 2026
Myopenouna person with myopiaverifiedMay 18, 2026
Myopianounan eyesight abnormality resulting from the eye's faulty refractive ability, meaning that items in the distance are not seen easilyverifiedMay 18, 2026
Myosarcomanounsarcoma of muscle tissueverifiedMay 18, 2026
Myosinnounthe commonest protein in muscleverifiedMay 18, 2026
Myosisnounreflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smallerverifiedMay 18, 2026
Myositisnouninflammation of muscle tissueverifiedMay 18, 2026
Myotactic ReflexnounMWEreflex contraction of a muscle when an attached tendon is pulledverifiedMay 18, 2026