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value, in economics

(Encyclopedia)value, in economics, worth of a commodity in terms of other commodities, or in terms of money (see price). Value depends on both desirability and scarcity. The marginal theory of value, pioneered in t...

variation, in biology

(Encyclopedia)variation, in biology: see Darwinism. ...

variation, in music

(Encyclopedia)variation, in music, a compositional device in which certain features of a musical unit, e.g., phase, are altered while others are retained in a subsequent statement of the unit. Modifications include...

bellflower, in botany

(Encyclopedia)bellflower or bluebell, name commonly used as a comprehensive term for members of the Campanulaceae, a family of chiefly herbaceous annuals or perennials of wide distribution, characteristically found...

Venus, in astronomy

(Encyclopedia)Venus, in astronomy, 2d planet from the sun; it is often called the evening star or morning star and is brighter than any object in the sky except the sun and the moon. Because its orbit lies between ...

veronica, in botany

(Encyclopedia)veronica, in botany: see figwort. ...

Vulcan, in astronomy

(Encyclopedia)Vulcan, in astronomy, hypothetical planet whose existence was proposed by Le Verrier to explain part of the advance of the perihelion of Mercury, not all of which could be accounted for by gravitation...

walleye, in medicine

(Encyclopedia)walleye: see strabismus.

walleye, in zoology

(Encyclopedia)walleye or walleyed pike: see perch. ...

Uranus , in astronomy

(Encyclopedia)Uranus yo͝orāˈnəs, yo͝orˈə– [key], in astronomy, 7th planet from the sun, at a mean distance of 1.78 billion mi (2.87 billion km), with an orbit lying between those of Saturn and Neptune; its...