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Orion, in astronomy

(Encyclopedia)Orion, in astronomy, constellation located on the celestial equator. It is one of the most conspicuous and easily recognizable constellations in the entire sky. From ancient times it has been mentione...

voice, in grammar

(Encyclopedia)voice, grammatical category according to which an action is referred to as done by the subject (active, e.g., men shoot bears) or to the subject (passive, e.g., bears are shot by men). In Latin, voice...

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. ...

valerian, in botany

(Encyclopedia)CE5 Valerian, Valeriana officinalis valerian, common name for some members of the Valerianaceae, a family chiefly of herbs and shrubs of temperate and colder regions of the Northern Hemisphere; a ...

value, in colorimetry

(Encyclopedia)value, in colorimetry: see color.

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...