| avihepadnavirus | A genus of hepadnaviridae infecting birds but rarely causing clinical problems. Transmission is predominantly vertical. Hepatitis b virus, duck is the type species. (12 Dec 1998) |
|---|---|
| avipoxvirus | A genus of the family poxviridae, subfamily chordopoxvirinae, comprising bird poxviruses. The type species is fowlpox virus. Transmission is mechanical by arthropods. (12 Dec 1998) |
| avirulent | Not virulent. (05 Mar 2000) |
| avision | 1. <ophthalmology> The act or faculty of seeing, sight. 2. <psychiatry> An apparition, a subjective sensation of vision not elicited by actual visual stimuli. 3. Visual acuity, symbol V. Origin: L. Visio (18 Nov 1997) |
| avitaminosis | A condition due to a deficiency of one or more essential vitamins. (12 Dec 1998) |
| avivement | An obsolete term for the excision of the edges of a wound to assist the healing process. Origin: Fr. Aviver, to quicken, revive (05 Mar 2000) |