| acantha | 1. <botany> A prickle. 2. <zoology> A spine or prickly fin. 3. <anatomy> The vertebral column; the spinous process of a vertebra. Origin: Gr. Thorn, fr. Point. See Acute. Source: Websters Dictionary (01 Mar 1998) |
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| acanthaceous | 1. Armed with prickles, as a plant. 2. <botany> Of, pertaining to, or resembling, the family of plants of which the acanthus is the type. Source: Websters Dictionary (01 Mar 1998) |
| acanthamoeba | A genus of free-living soil amoebae that produces no flagellate stage. Its organisms are pathogens for several infections in humans and have been found in the eye, bone, brain, and respiratory tract. (12 Dec 1998) |
| acanthamoeba keratitis | Infection of the cornea by an ameboid protozoan which may cause corneal ulceration leading to blindness. (12 Dec 1998) |
| acanthamoebiasis | Infection by free-living soil amoebae of the genus Acanthamoeba that may result in a necrotizing dermal or tissue invasion, or a fulminating and usually fatal primary amoebic meningoencephalitis. (05 Mar 2000) |