| CNV | choroidal neovascularization; contingent negative variation; cutaneous necrotizing vasculitis |
|---|---|
| CV | cardiac volume; cardiovascular; carotenoid vesicle; cell volume; central venous; cephalic vein; cere... |
| NV | nausea and vomiting; negative variation; neovascularization; next visit; nonveteran; normal value; n... |
| PINV | postimperative negative variation |
| TCNV | terminal contingent negative variation |
| CV | Coefficient of Variation |
|---|---|
| COV | Coefficient of variation |
| CV | coefficient variation |
| CNV | Contingent Negative Variation |
| CFV | cyclic flow variation |
| saltatory | Leaping or dancing; having the power of, or used in, leaping or dancing. <biology> Saltatory evolution, an affection in which pressure of the foot on a floor causes the patient to spring into the air, so as to make repeated involuntary motions of hopping and jumping. Origin: L. Saltatorius. See Saltant, and cf. Saltire. Source: Websters Dictionary (01 Mar 1998) |
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| saltatory chorea | Rhythmic dancing movements, as in procursive chorea. (05 Mar 2000) |
| saltatory conduction | A method of neuronal transmission in vertebrate nerves, where only specialised nodes of Ranvier participate in excitation. This reduces the capacitance of the neuron, allowing much faster transmission. See: myelin, Schwann cells. (18 Nov 1997) |
| saltatory evolution | The theory that evolution of a new species from an older one may occur as a large jump, such as a major repatterning of chromosomes, rather than by gradual accumulation of small steps or mutations. Compare: emergent evolution. (05 Mar 2000) |
| saltatory movement | Abrupt jumping movements of the sort shown by some intracellular particles. Mechanism unclear. (18 Nov 1997) |
| saltatory replication | The sudden amplification of a DNA sequence to generate many copies in a tandem arrangement. Possible mechanism for the origin of satellite DNA. (18 Nov 1997) |
| saltatory spasm | A spasmodic affection of the muscles of the lower extremities. Synonym: Bamberger's disease, dancing spasm, Gowers disease. (05 Mar 2000) |
| antigenic variation | The phenomenon of changes in surface antigens in parasitic populations of Trypanosoma and Plasmodium (and some other parasitic protozoa) in order to escape immunological defense mechanisms. at least 100 different surface proteins have been found to appear and disappear during antigenic variation in a clone of trypanosomes. Each antigen is encoded in a separate gene. Antigenic variation is also known to occur in free living Protozoa and certain bacteria. (18 Nov 1997) |
| variation | In genetics, deviation in characters in an individual from those typical of the group to which it belongs, also, deviation in characters of the offspring from those of its parents. (18 Nov 1997) |
| variation (genetics) | The phenotypic differences among individuals in a population. (12 Dec 1998) |
| phase variation | <microbiology> Alteration in the expression of surface antigens by bacteria. For example: Salmonella can express either of two forms of flagellin, H1 and H2, that are coded by different genes. Control of which form is expressed is brought about by inversion of the promoter for the H2 gene, which if functional (noninverted) is associated with the expression of H2 and the production of a repressor of the H1 gene. Inversion occurs about every 1000 bacterial divisions and is under the control of another gene, hin, that is within the invertable sequence. (31 Dec 1997) |
| coefficient of variation | The ratio of the standard deviation to the mean. (05 Mar 2000) |
| contingent negative variation | An increasing negative shift of the cortical electrical potentials associated with an anticipated response to an expected stimulus. It is an electrical event indicative of a state of readiness or expectancy. (12 Dec 1998) |
| somaclonal variation | The variation between individuals in a clone, particularly in plant clones. While the objective is usually to grow clones without variation, somaclonal variation does provide the opportunity to generate new plant types that would be harder or impossible to generate by conventional plant breeding. (14 Nov 1997) |
| isotypic variation | <immunology> Variability of antigens common to all members of a species, for example the five classes of immunoglobulins found in humans. See: idiotype and allotype. (18 Nov 1997) |
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