| medal | (noun) an award for winning a championship or commemorating some other event | Synonyms: decoration, laurel wreath, medallion, palm, ribbon |
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| medical | (noun) a thorough physical examination; includes a variety of tests depending on the age and sex and health of the person | Synonyms: checkup, health check, medical checkup, medical exam, medical examination |
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| megasporophyll | (noun) in non-flowering plants, a sporophyll that bears only megasporangia | - |
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| megestrol | (noun) a synthetic progestational compound used to treat endometrial carcinoma | Synonyms: megestrol acetate |
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| memorial | (noun) a structure erected to commemorate persons or events | Synonyms: monument |
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| (noun) a recognition of meritorious service | Synonyms: commemoration, remembrance |
| (noun) a written statement of facts submitted in conjunction with a petition to an authority | - |
| menial | (noun) a domestic servant | - |
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| menthol | (noun) a lotion containing menthol which gives it the smell of mint | - |
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| (noun) a crystalline compound that has the cool and minty taste and odor that occurs naturally in peppermint oil; used as a flavoring and in medicine to relieve itching, pain, and nasal congestion | - |
| mephobarbital | (noun) a long-acting crystalline barbiturate (trade name Mebaral) used as a sedative and as an anticonvulsant in the treatment of epilepsy | Synonyms: Mebaral |
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| merl | (noun) common black European thrush | Synonyms: blackbird, European blackbird, merle, ousel, ouzel, Turdus merula |
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| mescal | (noun) a colorless Mexican liquor distilled from fermented juices of certain desert plants of the genus Agavaceae (especially the century plant) | - |
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| (noun) a small spineless globe-shaped cactus; source of mescal buttons | Synonyms: Lophophora williamsii, mezcal, peyote |
| mestranol | (noun) a synthetic form of estrogen used in combination with a progestin in oral contraceptives | - |
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| metacarpal | (noun) any bone of the hand between the wrist and fingers | Synonyms: metacarpal bone |
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| metal | (noun) any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Synonyms: metallic element |
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| (noun) a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten | Synonyms: alloy |
| metaproterenol | (noun) a bronchodilator (trade name Alupent) used to treat asthma and emphysema and other lung conditions; available in oral or inhalant forms; side effects include tachycardia and shakiness | Synonyms: Alupent |
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| metatarsal | (noun) any bone of the foot between the ankle and the toes | - |
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| methanal | (noun) a colorless poisonous gas; made by the oxidation of methanol | Synonyms: formaldehyde |
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| methanol | (noun) a light volatile flammable poisonous liquid alcohol; used as an antifreeze and solvent and fuel and as a denaturant for ethyl alcohol | Synonyms: methyl alcohol, wood alcohol, wood spirit |
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| metharbital | (noun) anticonvulsant drug (trade name Gemonil) used in the treatment of epilepsy | Synonyms: Gemonil |
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| methocarbamol | (noun) muscle relaxant for skeletal muscles (trade name Robaxin) used to treat spasms | Synonyms: Robaxin |
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| methyl | (noun) the univalent radical CH3- derived from methane | Synonyms: methyl group, methyl radical |
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| metical | (noun) the basic unit of money in Mozambique; equal to 100 centavos | - |
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| metoprolol | (noun) beta blocker (trade name Lopressor) used in treating hypertension and angina and arrhythmia and acute myocardial infarction; has adverse side effects (depression and exacerbation of congestive heart failure etc.) | Synonyms: Lopressor |
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| mezcal | (noun) a small spineless globe-shaped cactus; source of mescal buttons | Synonyms: Lophophora williamsii, mescal, peyote |
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| miaul | (noun) the sound made by a cat (or any sound resembling this) | Synonyms: meow, mew, miaou, miaow |
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| microcrystal | (noun) any crystal of microscopic size. | - |
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| microfossil | (noun) a fossil that must be studied microscopically | - |
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| microsporophyll | (noun) in non-flowering plants, a sporophyll that bears only microsporangia | - |
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| mil | (noun) a unit of length equal to one thousandth of an inch; used to specify thickness (e.g., of sheets or wire) | - |
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| (noun) a metric unit of volume equal to one thousandth of a liter | Synonyms: cc, cubic centimeter, cubic centimetre, milliliter, millilitre, ml |
| (noun) an angular unit used in artillery; equal to 1/6400 of a complete revolution | - |
| (noun) a Cypriot monetary unit equal to one thousandth of a pound | - |
| (noun) a Swedish unit of length equivalent to 10 km | Synonyms: mile, Swedish mile |
| milfoil | (noun) ubiquitous strong-scented mat-forming Eurasian herb of wasteland, hedgerow or pasture having narrow serrate leaves and small usually white florets; widely naturalized in North America | Synonyms: Achillea millefolium, yarrow |
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| mill | (noun) the act of grinding to a powder or dust | Synonyms: grind, pulverisation, pulverization |
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| (noun) machinery that processes materials by grinding or crushing | Synonyms: grinder, milling machinery |
| (noun) a plant consisting of one or more buildings with facilities for manufacturing | Synonyms: factory, manufactory, manufacturing plant |
| millwheel | (noun) water wheel that is used to drive machinery in a mill | Synonyms: mill wheel |
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| mineral | (noun) solid homogeneous inorganic substances occurring in nature having a definite chemical composition | - |
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| minoxidil | (noun) a vasodilator (trade name Loniten) used to treat severe hypertension; one side effect is hirsutism so it is also sold (trade name Rogaine) as a treatment for male-patterned baldness | Synonyms: Loniten, Rogaine |
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| minstrel | (noun) a singer of folk songs | Synonyms: folk singer, jongleur, poet-singer, troubadour |
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| (noun) a performer in a minstrel show | - |
| mirasol | (noun) annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America | Synonyms: common sunflower, Helianthus annuus |
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| misconstrual | (noun) a kind of misinterpretation resulting from putting a wrong construction on words or actions (often deliberately) | Synonyms: misconstruction |
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| misdeal | (noun) an incorrect deal | - |
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| mispickel | (noun) a silver-white or grey ore of arsenic | Synonyms: arsenopyrite |
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| missal | (noun) (Roman Catholic Church) a book containing all the prayers and responses needed to celebrate Mass throughout the year | - |
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| mistral | (noun) a strong north wind that blows in France during the winter | - |
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| mistrial | (noun) a trial that is invalid or inconclusive | - |
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| ml | (noun) a metric unit of volume equal to one thousandth of a liter | Synonyms: cc, cubic centimeter, cubic centimetre, mil, milliliter, millilitre |
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| modal | (noun) an auxiliary verb (such as `can' or `will') that is used to express modality | Synonyms: modal auxiliary, modal auxiliary verb, modal verb |
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| model | (noun) the act of representing something (usually on a smaller scale) | Synonyms: modeling, modelling |
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| (noun) representation of something (sometimes on a smaller scale) | Synonyms: simulation |
| (noun) a hypothetical description of a complex entity or process | Synonyms: framework, theoretical account |
| (noun) something to be imitated | Synonyms: example, exemplar, good example |
| (noun) a representative form or pattern | Synonyms: example |
| (noun) a type of product | - |
| (noun) a person who poses for a photographer or painter or sculptor | Synonyms: poser |
| (noun) someone worthy of imitation | Synonyms: role model |
| (noun) a woman who wears clothes to display fashions | Synonyms: fashion model, manakin, manikin, mannequin, mannikin |
| mogul | (noun) a very wealthy or powerful businessman | Synonyms: baron, big businessman, business leader, king, magnate, power, top executive, tycoon |
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| (noun) a bump on a ski slope | - |
| mol | (noun) the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unites | Synonyms: gram molecule, mole |
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| molehill | (noun) a mound of earth made by moles while burrowing | - |
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| moll | (noun) the girlfriend of a gangster | Synonyms: gangster's moll, gun moll |
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| monal | (noun) brilliantly colored pheasant of southern Asia | Synonyms: monaul |
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| monaul | (noun) brilliantly colored pheasant of southern Asia | Synonyms: monal |
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| mongrel | (noun) an inferior dog or one of mixed breed | Synonyms: cur, mutt |
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| (noun) derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin | Synonyms: bastard |
| monoclonal | (noun) any of a class of antibodies produced in the laboratory by a single clone of cells or a cell line and consisting of identical antibody molecules | Synonyms: monoclonal antibody |
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| monolingual | (noun) a person who knows only one language | - |
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| monorail | (noun) a railway having a single track | - |
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| moonshell | (noun) marine gastropods having smooth rounded shells that form short spires | Synonyms: moon shell |
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| moorfowl | (noun) reddish-brown grouse of upland moors of Great Britain | Synonyms: Lagopus scoticus, moor-bird, moorbird, moorgame, red grouse |
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| moral | (noun) the significance of a story or event | Synonyms: lesson |
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| morel | (noun) any of various edible mushrooms of the genus Morchella having a brownish spongelike cap | - |
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| morsel | (noun) a small amount of solid food; a mouthful | Synonyms: bit, bite |
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| (noun) a small quantity of anything | - |
| mortal | (noun) a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential | Synonyms: individual, person, somebody, someone, soul |
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| motel | (noun) a motor hotel | - |
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| mothball | (noun) a small sphere of camphor or naphthalene used to keep moths away from stored clothing | Synonyms: camphor ball |
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| mouthful | (noun) a small amount eaten or drunk | Synonyms: taste |
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| (noun) the quantity that can be held in the mouth | - |
| muckhill | (noun) a heap of dung or refuse | Synonyms: dunghill, midden, muckheap |
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| mugful | (noun) the quantity that can be held in a mug | Synonyms: mug |
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| mull | (noun) a term used in Scottish names of promontories | - |
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| multinomial | (noun) a mathematical function that is the sum of a number of terms | Synonyms: polynomial |
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| mural | (noun) a painting that is applied to a wall surface | Synonyms: wall painting |
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| muscadel | (noun) wine from muscat grapes | Synonyms: muscadelle, muscat, muscatel |
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| muscatel | (noun) sweet aromatic grape used for raisins and wine | Synonyms: muscat, muscat grape |
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| (noun) wine from muscat grapes | Synonyms: muscadel, muscadelle, muscat |
| musical | (noun) a play or film whose action and dialogue is interspersed with singing and dancing | Synonyms: musical comedy, musical theater |
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| mussel | (noun) marine or freshwater bivalve mollusk that lives attached to rocks etc. | - |
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| (noun) black marine bivalves usually steamed in wine | - |
| mycosterol | (noun) a kind of sterol found in fungi. | - |
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| myofibril | (noun) one of many contractile filaments that make up a striated muscle fiber | Synonyms: myofibrilla, sarcostyle |
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| nadolol | (noun) a beta-adrenergic blocking agent (trade name Corgard) that is used to treat hypertension and angina | Synonyms: Corgard |
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| nail | (noun) a thin pointed piece of metal that is hammered into materials as a fastener | - |
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| (noun) horny plate covering and protecting part of the dorsal surface of the digits | - |
| (noun) a former unit of length for cloth equal to 1/16 of a yard | - |
| naphthol | (noun) either of two phenols derived from naphthalene | - |
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| narwal | (noun) small Arctic whale the male having a long spiral ivory tusk | Synonyms: Monodon monoceros, narwhal, narwhale |
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| narwhal | (noun) small Arctic whale the male having a long spiral ivory tusk | Synonyms: Monodon monoceros, narwal, narwhale |
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| nasal | (noun) an elongated rectangular bone that forms the bridge of the nose | Synonyms: nasal bone, os nasale |
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| (noun) a consonant produced through the nose with the mouth closed | Synonyms: nasal consonant |
| national | (noun) a person who owes allegiance to that nation | Synonyms: subject |
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| natural | (noun) (craps) a first roll of 7 or 11 that immediately wins the stake | - |
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| (noun) a notation cancelling a previous sharp or flat | Synonyms: cancel |
| (noun) someone regarded as certain to succeed | - |
| navel | (noun) a scar where the umbilical cord was attached | Synonyms: belly button, bellybutton, omphalos, omphalus, umbilicus |
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| (noun) the center point or middle of something | Synonyms: navel point |
| neoliberal | (noun) a liberal who subscribes to neoliberalism | - |
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| netball | (noun) a team game that resembles basketball; a soccer ball is to be thrown so that it passes through a ring on the top of a post | - |
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| neurochemical | (noun) any organic substance that occurs in neural activity | - |
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| neurofibril | (noun) Any of the long, thin, microscopic fibrils that run through the body of a neuron and extend into the axon and dendrites, giving the neuron support and shape. | - |
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| neuropil | (noun) the complex network of unmyelinated axones, dendrites, and glial branches that form the bulk of the central nervous system's grey matter and in which nerve cell bodies are embedded | Synonyms: neuropile |
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| neutral | (noun) one who does not side with any party in a war or dispute | - |
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| neutrophil | (noun) the chief phagocytic leukocyte; stains with either basic or acid dyes | Synonyms: neutrophile |
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| newel | (noun) the central pillar of a circular staircase | - |
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| (noun) the post at the top or bottom of a flight of stairs; it supports the handrail | Synonyms: newel post |
| newsreel | (noun) a short film and commentary about current events | - |
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| nickel | (noun) a United States coin worth one twentieth of a dollar | - |
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| (noun) five dollars worth of a drug | Synonyms: nickel note |
| (noun) a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite | Synonyms: atomic number 28, Ni |
| nightfall | (noun) the time of day immediately following sunset | Synonyms: crepuscle, crepuscule, dusk, evenfall, fall, gloam, gloaming, twilight |
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| nihil | (noun) (Latin) nil; nothing (as used by a sheriff after an unsuccessful effort to serve a writ) | - |
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| nil | (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, cypher, goose egg, nada, naught, nix, nothing, null, zero, zilch, zip, zippo |
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| nimblewill | (noun) slender branching American grass of some value for grazing in central United States | Synonyms: Muhlenbergia schreberi, nimble Will |
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| nitril | (noun) any of a class of organic compounds containing the cyano radical -CN | Synonyms: cyanide, nitrile |
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| nombril | (noun) the center point on a shield | - |
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| nominal | (noun) a phrase that can function as the subject or object of a verb | Synonyms: nominal phrase, noun phrase |
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