| acalephan | <zoology> One of the Acalephae. Source: Websters Dictionary (01 Mar 1998) |
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| acalephoid | <zoology> Belonging to or resembling the Acalephae or jellyfishes. Origin: Acaleph. Source: Websters Dictionary (01 Mar 1998) |
| acalysinous | <botany> Without a calyx, or outer floral envelope. Origin: Gr. Priv. + calyx. Source: Websters Dictionary (01 Mar 1998) |
| acampsia | <rheumatology> Stiffening or rigidity of a joint for any reason. (06 Oct 1997) |
| 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) |
| 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) |
| acanthella | An intermediate larva stage of Acanthocephala, formed within the arthropod host; a preinfective, nonencysted stage leading to the infective cystacanth. Origin: G. Akantha, thorn, spine (05 Mar 2000) |
| acanthesthesia | Paresthesia of a pinprick. Origin: G. Akantha, thorn, + aisthesis, sensation (05 Mar 2000) |
| Acanthia lectularia | Early name for Cimex lectularius. Origin: G. Akantha, thorn, prickle; L. Lectus, a bed (05 Mar 2000) |
| acanthine | Of, pertaining to, or resembling, the plant acanthus. Origin: L. Acanthinus, Gr, thorny, fr. See Acanthus. Source: Websters Dictionary (01 Mar 1998) |
| acanthion | The tip of the anterior nasal spine. Synonym: akanthion. Origin: G. Akantha, thorn (05 Mar 2000) |
| acantho- | A spinous process; spiny, thorny. Origin: G. Akantha, a thorn, the backbone, the spine, fr. Ake, a point, + anthos, a flower (05 Mar 2000) |