| acorea | (noun) absence of the pupil in an eye | - |
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| aperea | (noun) South American cavy; possibly ancestral to the domestic guinea pig | Synonyms: Cavia porcellus, wild cavy |
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| area | (noun) a part of a structure having some specific characteristic or function | - |
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| (noun) the extent of a 2-dimensional surface enclosed within a boundary | Synonyms: expanse, surface area |
| (noun) a part of an animal that has a special function or is supplied by a given artery or nerve | Synonyms: region |
| (noun) a subject of study | - |
| (noun) a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography) | Synonyms: country |
| (noun) a particular environment or walk of life | Synonyms: arena, domain, field, orbit, sphere |
| chorea | (noun) any of several degenerative nervous disorders characterized by spasmodic movements of the body and limbs | - |
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| (noun) chorea in dogs | Synonyms: canine chorea |
| diethylmalonylurea | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, veronal |
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| malonylurea | (noun) a white crystalline acid derived from pyrimidine; used in preparing barbiturate drugs | Synonyms: barbituric acid |
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| orthochorea | (noun) a form of chorea in which spasms occur mainly when the patient is erect | - |
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| spirea | (noun) any rosaceous plant of the genus Spiraea; has sprays of small white or pink flowers | Synonyms: spiraea |
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| (noun) a Japanese shrub that resembles members of the genus Spiraea; widely cultivated in many varieties for its dense panicles of flowers in many colors; often forced by florists for Easter blooming | Synonyms: Astilbe japonica, spiraea |
| sulfonylurea | (noun) antidiabetic consisting of any of several drugs that reduce the level of glucose in the blood; used to treat diabetes mellitus | - |
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| urea | (noun) the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics | Synonyms: carbamide |
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