Vopor Pressure Deficit 



The difference between the actual vapor pressure in the 

 atmosphere in a certain space and the vapor pressure at 

 saturation. 



Variant 



An organism, community, types of soil, etc., that differs 

 sufficiently in its attributes from the typical specimen or 

 norm to be classified as a variation of the group as a whole. 



Variate 



The attribute or characteristic such as height and weight 

 that is used in statistical measurements of Variation. 



Variation 



Divergences in the characteristics of organisms, or other 

 objects, of the same kind caused either by the environment 

 or by differences in the genetic constitution of the organism, 

 cf. Phenotype, Genotype. 



Variegation 



The irregular occurrence of patches, bands, or other 

 areas on the surface of organs of plants and animals, such as 

 leaves, caused chiefly by the lack of pigment in the cells of 

 these areas or beneath them. 



Variety 



A taxonomic group or Taxon (q. v.) within a Species, or 

 a Subspecies, e.g., Juniperus communis L. var. sibirica 

 (Burgsd.) Rydb. cf. Cultivar. 



Varve 



A layer in a mass of lacustrine sediments, which may 

 consist of coarser and finer sediments, deposited annually 

 in a lake or sea. 



Vascular 



Refers to vessels or ducts that conduct fluids in organisms. 



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