| ata | <abbreviation> Atmosphere absolute. (05 Mar 2000) |
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| atacamite | <chemical> An oxychloride of copper, usually in emerald-green prismatic crystals. Origin: From the desert of Atacama, where found. Source: Websters Dictionary (01 Mar 1998) |
| atactic | <chemistry> This describes a polymer that has no regularly repeated structural units. (09 Oct 1997) |
| atactic abasia | Difficulty in walking due to ataxia of the legs. (05 Mar 2000) |
| atactic agraphia | Agraphia in which not even unconnected letters can be written. Synonym: atactic agraphia, literal agraphia. (05 Mar 2000) |
| atactilia | Loss of the sense of touch. Origin: G. A-priv. + L. Tactilis, relating to touch, fr. Tango, pp. Tactus, to touch (05 Mar 2000) |
| ataractic | 1. Having a calming or tranquillising effect. 2. A tranquilliser. Synonym: ataraxic. Origin: G. Ataraktos, calm (05 Mar 2000) |
| ataraxia | Calmness and peace of mind; tranquility. Origin: G. A-priv. + taraktos, disturbed, + -ia (05 Mar 2000) |
| ataraxic | 1. Having a calming or tranquillising effect. 2. A tranquilliser. Synonym: ataraxic. Origin: G. Ataraktos, calm (05 Mar 2000) |
| ataunto | Fully rigged, as a vessel; with all sails set; set on end or set right. Origin: F. Autant as much (as possible). Source: Websters Dictionary (01 Mar 1998) |
| atavism | The recurrence, or a tendency to a recurrence, of the original type of a species in the progeny of its varieties; resemblance to remote rather than to near ancestors; reversion to the original form. <biology> The recurrence of any peculiarity or disease of an ancestor in a subsequent generation, after an intermission for a generation or two. "Now and then there occur cases of what physiologists call atavism, or reversion to an ancestral type of character." (J. Fiske) Origin: L. Atavus an ancestor, fr. Avus a grandfather. Source: Websters Dictionary (01 Mar 1998) |
| atavistic | Relating to atavism. (05 Mar 2000) |
| ataxia | <neurology> Failure of muscular coordination, irregularity of muscular action. Origin: Gr. Taxis = order (16 Dec 1997) |
| ataxia cordis | <cardiology> A condition where there is disorganised electrical conduction in the atria, resulting in ineffective pumping of blood into the ventricle. Acronym: AF (02 Jan 1998) |
| ataxia of calves | A specific cerebellar ataxia in the Jersey breed, probably a recessive genetic trait. (05 Mar 2000) |