| axenic | (adjective) (of experimental animals) raised under sterile conditions | - |
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| (adjective) (used of cultures of microorganisms) completely free from other organisms | - |
| exenterate | (verb) remove the contents of (an organ) | - |
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| exenteration | (noun) surgical removal of the organs within a body cavity (as those of the pelvis) | - |
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| flaxen | (adjective) of hair color; pale yellowish to yellowish brown | Synonyms: sandy |
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| hexenbesen | (noun) an abnormal tufted growth of small branches on a tree or shrub caused by fungi or insects or other physiological disturbance | Synonyms: staghead, witch broom, witches' broom |
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| naproxen | (noun) a nonsteroidal anti-inflammatory drug (trade name Naprosyn) used in the treatment of arthritis and musculoskeletal inflammation and moderate pain | Synonyms: Naprosyn |
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| oxen | (noun) domesticated bovine animals as a group regardless of sex or age | Synonyms: Bos taurus, cattle, cows, kine |
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| pyroxene | (noun) any of a group of crystalline silicate mineral common in igneous and metamorphic rocks | - |
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| thiothixene | (noun) a tranquilizer (trade name Navane) used to treat schizophrenia | Synonyms: Navane |
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| vixen | (noun) a female fox | - |
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| (noun) a malicious woman with a fierce temper | Synonyms: harpy, hellcat |
| vixenish | (adjective) shrewish and malicious | - |
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| waxen | (adjective) made of or covered with wax | Synonyms: waxy |
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| (adjective) having the paleness of wax | Synonyms: waxlike, waxy |
| woadwaxen | (noun) small Eurasian shrub having clusters of yellow flowers that yield a dye; common as a weed in Britain and the United States; sometimes grown as an ornamental | Synonyms: dyer's-broom, dyer's greenweed, dyeweed, Genista tinctoria, greenweed, whin, woodwaxen |
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| woodwaxen | (noun) small Eurasian shrub having clusters of yellow flowers that yield a dye; common as a weed in Britain and the United States; sometimes grown as an ornamental | Synonyms: dyer's-broom, dyer's greenweed, dyeweed, Genista tinctoria, greenweed, whin, woadwaxen |
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| xenogeneic | (adjective) denoting or relating to cells or tissues from individuals belonging to different species | - |
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| xenogenesis | (noun) the alternation of two or more different forms in the life cycle of a plant or animal | Synonyms: alternation of generations, heterogenesis |
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| xenograft | (noun) tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species | Synonyms: heterograft |
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| xenolith | (noun) (geology) a piece of rock of different origin from the igneous rock in which it is embedded | - |
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| xenon | (noun) a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts | Synonyms: atomic number 54, Xe |
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| xenophobia | (noun) a fear of foreigners or strangers | - |
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| xenophobic | (adjective) suffering from xenophobia; having abnormal fear or hatred of the strange or foreign | - |
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| xenotime | (noun) a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form | - |
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| xenotransplant | (noun) a surgical procedure in which tissue or whole organs are transferred from one species to another species | Synonyms: xenotransplantation |
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| xenotransplantation | (noun) a surgical procedure in which tissue or whole organs are transferred from one species to another species | Synonyms: xenotransplant |
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