| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| enrich | (verb) make better or improve in quality | - |
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| (verb) make wealthy or richer | - |
| enrichment | (noun) act of making fuller or more meaningful or rewarding | - |
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| (noun) a gift that significantly increases the recipient's wealth | - |
| escherichia | (noun) a genus of enteric bacteria | - |
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| ostrich | (noun) fast-running African flightless bird with two-toed feet; largest living bird | Synonyms: Struthio camelus |
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| (noun) a person who refuses to face reality or recognize the truth (a reference to the popular notion that the ostrich hides from danger by burying its head in the sand) | - |
| peritrichous | (adjective) covered all over with uniformly distributed flagella | - |
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| rich | (adjective) possessing material wealth | - |
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| (adjective) having an abundant supply of desirable qualities or substances (especially natural resources) | - |
| (adjective) suggestive of or characterized by great expense | - |
| (adjective) high in mineral content; having a high proportion of fuel to air | - |
| (adjective) causing indignation due to hypocrisy | - |
| (adjective) affording an abundant supply | Synonyms: ample, copious, plenteous, plentiful |
| (adjective) strong; intense | Synonyms: deep |
| (adjective) marked by great fruitfulness | Synonyms: fat, fertile, productive |
| (adjective) pleasantly full and mellow | - |
| (adjective) marked by richness and fullness of flavor | Synonyms: full-bodied, racy, robust |
| (adjective) containing plenty of fat, or eggs, or sugar | - |
| (adjective) of great worth or quality | - |
| (adjective) very productive | - |
| (noun) people who have possessions and wealth (considered as a group) | Synonyms: rich people |
| riches | (noun) an abundance of material possessions and resources | Synonyms: wealth |
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| richly | (adverb) in a rich and lavish manner | Synonyms: extravagantly, lavishly |
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| (adverb) in a rich manner | Synonyms: high, luxuriously |
| (adverb) to an ample degree or in an ample manner | Synonyms: amply |
| richness | (noun) a strong deep vividness of hue | - |
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| (noun) the property of a sensation that is rich and pleasing | Synonyms: fullness, mellowness |
| (noun) the property of producing abundantly and sustaining vigorous and luxuriant growth | Synonyms: fertility, prolificacy, rankness |
| (noun) the property of being extremely abundant | Synonyms: cornucopia, profuseness, profusion |
| (noun) splendid or imposing in size or appearance | Synonyms: grandness, impressiveness, magnificence |
| (noun) the quality of having high intrinsic value | - |
| (noun) abundant wealth | Synonyms: affluence |
| richweed | (noun) a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves | Synonyms: clearweed, dead nettle, Pilea pumilla |
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| (noun) erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States | Synonyms: Collinsonia canadensis, horse balm, horseweed, stone-root, stone root, stoneroot |
| sporotrichosis | (noun) a chronic fungal infection of the skin and lymph nodes | - |
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| tovarich | (noun) a comrade (especially in Russian communism) | Synonyms: tovarisch |
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| trichina | (noun) parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles | Synonyms: Trichinella spiralis |
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| trichiniasis | (noun) infestation by trichina larvae that are transmitted by eating inadequately cooked meat (especially pork); larvae migrate from the intestinal tract to the muscles where they become encysted | Synonyms: myositis trichinosa, trichinosis |
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| trichinosis | (noun) infestation by trichina larvae that are transmitted by eating inadequately cooked meat (especially pork); larvae migrate from the intestinal tract to the muscles where they become encysted | Synonyms: myositis trichinosa, trichiniasis |
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| trichion | (noun) point where the hairline meets the midpoint of the forehead | Synonyms: crinion |
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| trichloride | (noun) any compound containing three chlorine atoms in each molecule | - |
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| trichlormethiazide | (noun) diuretic drug (trade name Naqua) used to treat hypertension | Synonyms: Naqua |
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| trichloroethane | (noun) a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | Synonyms: TCE, trichloroethylene |
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| trichloroethylene | (noun) a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | Synonyms: TCE, trichloroethane |
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| trichloromethane | (noun) a volatile liquid haloform (CHCl3); formerly used as an anesthetic | Synonyms: chloroform |
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| trichobezoar | (noun) a compact mass of hair that forms in the alimentary canal (especially in the stomach of animals as a result of licking fur) | Synonyms: hair ball, hairball |
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| trichodesmium | (noun) large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation | - |
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| trichomonad | (noun) cause of trichomoniasis in women and cattle and birds | - |
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| trichomoniasis | (noun) infection of the vagina | - |
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| trichopteran | (noun) caddis fly | Synonyms: trichopteron, trichopterous insect |
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| trichopteron | (noun) caddis fly | Synonyms: trichopteran, trichopterous insect |
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| trichotillomania | (noun) an irresistible urge to pull out your own hair | - |
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| trichotomy | (noun) being threefold; a classification into three parts or subclasses | - |
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| trichroism | (noun) pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions | - |
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| trichromacy | (noun) the normal ability to see colors | Synonyms: chromatic vision, color vision |
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| trichromatic | (adjective) having or involving three colors | Synonyms: trichrome, tricolor |
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| trichrome | (adjective) having or involving three colors | Synonyms: trichromatic, tricolor |
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| trichuriasis | (noun) infestation by a roundworm; common in tropical areas with poor sanitation | - |
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