| varan | <zoology> The monitor. See Monitor. Origin: F. Source: Websters Dictionary (01 Mar 1998) |
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| varanus | <zoology> A genus of very large lizards native of Asia and Africa. It includes the monitors. See Monitor. Origin: NL, fr. Ar. Waran, waral; cf. F. Varan, from the Arabic. Source: Websters Dictionary (01 Mar 1998) |
| Varciella-Zoster ORF47-associated protein kinase | <enzyme> Catalyses the in vitro phosphorylation of the vzv orf62 protein Registry number: EC 2.7.1.- Synonym: vzv orf47-apk (26 Jun 1999) |
| vare | <zoology> A weasel. <zoology> Vare widgeon, a female or young male of the smew; a weasel duck; so called from the resemblance of the head to that of a vare, or weasel. Source: Websters Dictionary (01 Mar 1998) |
| vari | <zoology> The ringtailed lemur (Lemur catta) of Madagascar. Its long tail is annulated with black and white. Origin: Cf. F. Vari. Source: Websters Dictionary (01 Mar 1998) |
| variability | The state of being variable. (18 Nov 1997) |
| variable | One of a battery of antigenicdeterminants expressed by a microorganismto elude immune detection. (09 Oct 1997) |
| variable antigen | <immunology> Term usually applied to the surface antigens of those parasitic or pathogenic organisms that can alter their antigenic character to evade host immune responses. (See antigenic variation). (18 Nov 1997) |
| variable deceleration | Transient foetal bradycardia usually denoting compression of the umbilical cord which may occur at any time in relation to a uterine contraction. (05 Mar 2000) |
| variable gene | <molecular biology> Those regions in the amino acid sequence of both the heavy and the light chains of immunoglobulins where there is considerable sequence variability from one immunoglobulin to other of the same class, in contrast to constant sequence (C) regions. The V regions are associated with the antigen binding areas. They contain hypervariable regions of particularly high sequence diversity. (18 Nov 1997) |
| variable region | <molecular biology> Those regions in the amino acid sequence of both the heavy and the light chains of immunoglobulins where there is considerable sequence variability from one immunoglobulin to other of the same class, in contrast to constant sequence (C) regions. The V regions are associated with the antigen binding areas. They contain hypervariable regions of particularly high sequence diversity. (18 Nov 1997) |
| variable surface glycoprotein | <protein> One of a battery of antigenicdeterminants expressed by a microorganism to elude immune detection. (09 Oct 1997) |
| variance | 1. The state of being variable, different, divergent, or deviate; a degree of deviation. 2. A measure of the variation shown by a set of observations, defined as the sum of squares of deviations from the mean, divided by the number of degrees of freedom in the set of observations. (05 Mar 2000) |
| variance ratio | The distribution of the ratio of two independent estimates of the same variance from a gaussian distribution based on samples of sizes (n + 1) and (m + 1) respectively. Estimates are usually based on one such sample analyzed in such a way as to make them independent e.g., analysis of variance; and F may be used to test a null hypothesis that the observed differences among sample means is no greater than could readily be accounted for by chance. (05 Mar 2000) |
| variant | Something which differs in form from another thing, though really the same; as, a variant from a type in natural history; a variant of a story or a word. Origin: Cf. F. Variante. Source: Websters Dictionary (01 Mar 1998) |