Glossary · Nouns · M
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TermTypeDefinitionClassificationsUpdated
Mefloquine HydrochloridenounMWEan antimalarial drug (trade name Larium and Mephaquine) that is effective in cases that do not respond to chloroquineverified
Megagametophytenounthe female gametophyte produced by the megaspore of a plant that produces both microspore and megasporesverified
Megahitnounan unusually successful hit with widespread popularity and huge sales (especially a movie or play or recording or novel)verified
MegalithnounMemorial consisting of a very large stone forming part of a prehistoric structure, especially in Western Europe.verified
Megalithic StructurenounMWEmemorial consisting of a very large stone forming part of a prehistoric structure (especially in western Europe)verified
Megaloblastnounabnormally large red blood cell present in pernicious anemia and folic acid deficiencyverified
Megaloblastic AnaemianounMWEanemia characterized by many large immature and dysfunctional red blood cells (megaloblasts) in the bone marrowverified
Megaloblastic AnemianounMWEanemia characterized by many large immature and dysfunctional red blood cells (megaloblasts) in the bone marrowverified
Megalosaurnoungigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europeverified
Megalosaurusnoungigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europeverified
Megaphonenouna cone-shaped acoustic device held to the mouth to intensify and direct the human voiceverified
Megatherenoungigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in Americaverified
Megatonnouna measure of explosive power (of an atomic weapon) equal to that of one million tons of TNTverified
Megaton BombnounMWEa nuclear weapon with an explosive power equivalent to one million tons of TNTverified
Megavitamin TherapynounMWEtherapy based on a theory that taking very large doses of vitamins will prevent or cure physical or psychological disordersverified
Megestrol AcetatenounMWEa synthetic progestational compound used to treat endometrial carcinomaverified
MeinounJapanese ornamental tree with fragrant white or pink blossoms and small yellow fruitsverified
Meiosisnoun(genetics) cell division that produces reproductive cells in sexually reproducing organismsverified
Melaenanounabnormally dark tarry feces containing blood (usually from gastrointestinal bleeding)verified
Melancholy ThistlenounMWEperennial stoloniferous thistle of northern Europe with lanceolate basal leaves and usually solitary heads of reddish-purple flowersverified
Melaninnouninsoluble pigments that account for the color of e.g. skin and scales and feathersverified
Melanismnouna condition characterized by abnormal deposits of melanin (especially in the skin)verified
Melanocytenouna cell in the basal layer of the epidermis that produces melanin under the control of the melanocyte-stimulating hormoneverified
Melanocyte-Stimulating HormonenounMWEa hormone secreted by the anterior pituitary gland that controls the degree of pigmentation in melanocytesverified
Melanomanounany of several malignant neoplasms (usually of the skin) consisting of melanocytesverified
Melanosisnouna condition characterized by abnormal deposits of melanin (especially in the skin)verified
Melasmanouna tan discoloration of a woman's face that is associated with pregnancy or with the use of oral contraceptivesverified
Melenanounabnormally dark tarry feces containing blood (usually from gastrointestinal bleeding)verified
Melilotnounerect annual or biennial plant grown extensively especially for hay and soil improvementverified
Melilotusnounerect annual or biennial plant grown extensively especially for hay and soil improvementverified
Meliorationnounthe linguistic process in which over a period of time a word grows more positive in connotation or more elevated in meaningverified
Melonnounany of numerous fruits of the gourd family having a hard rind and sweet juicy fleshverified
Melon TreenounMWEtropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruitverified
Melphalannounantineoplastic drug (trade name Alkeran) used to treat multiple myeloma and some other malignanciesverified