| aviation | Design, development, manufacture, and operation of heavier-than-air aircraft. (12 Dec 1998) |
|---|---|
| aviation medicine | The study and practice of medicine as it applies to physiologic problems peculiar to aviation. Synonym: aeromedicine. (05 Mar 2000) |
| aviation otitis | See Aerotitis. (12 Dec 1998) |
| aviator's disease | Syndrome resembling decompression sickness occurring in occupants of airplanes that reach very high altitudes without adequate pressurization of the cabin. See: decompression sickness. (05 Mar 2000) |
| aviator's ear | See Aerotitis. (12 Dec 1998) |
| avibirnavirus | A genus of RNA viruses in the family birnaviridae infecting birds. It is transmitted horizontally with no known vectors. The type species is infectious bursal disease virus. (12 Dec 1998) |
| avicula | <zoology> A genus of marine bivalves, having a pearly interior, allied to the pearl oyster; so called from a supposed resemblance of the typical species to a bird. Origin: L, small bird. Source: Websters Dictionary (01 Mar 1998) |
| avicularia | <zoology> See prehensile processes on the cells of some Bryozoa, often having the shape of a bird's bill. Origin: NL. See Avicular. Source: Websters Dictionary (01 Mar 1998) |
| aviculture | <ornithology> Rearing and care of birds. Origin: L. Avis bird + cultura culture. Source: Websters Dictionary (01 Mar 1998) |
| avidin | <protein> Biotin binding protein (68 kD) from egg white. Binding is so strong as to be effectively irreversible a diet of raw egg white leads to biotin deficiency. (18 Nov 1997) |
| avidin-biotin immunofluorescence | Holds promise for more sensitive and specific amplification of indirect fluorescent antibody procedures. Antibody to the patient's specific antibodies is labelled with biotin, a compound capable of specifically binding avidin in high concentrations. Fluorescent labelled avidin is then added and fluorescent microscopy is used to detect the presence of the complexes. (05 Mar 2000) |
| avidity | <chemistry> Strength of binding, usually of a small molecule with multiple binding sites by a larger, particularly the binding of a complex antigen by an antibody. (Affinity refers to simple receptor ligand systems.) (18 Nov 1997) |
| avidity antibody | The sum total of the functional binding strength between a polyvariant and its antibody. The total binding strength represents the sum strength of all the affinity bonds. (05 Mar 2000) |
| avifauna | <ornithology> The birds, or all the kinds of birds, inhabiting a region. Origin: NL, fr. L. Avis bird + E. Fauna. Source: Websters Dictionary (01 Mar 1998) |
| avignon berry | <botany> The fruit of the Rhamnus infectorius, eand of other species of the same genus; so called from the city of Avignon, in France. It is used by dyers and painters for colouring yellow. Synonym: French berry. Source: Websters Dictionary (01 Mar 1998) |