Difference between revisions of "Organ"

From Biology-Online Dictionary | Biology-Online Dictionary
Line 1: Line 1:
1. An [[instrument]] or [[medium]] by which some important [[action]] is performed, or an important [[end]] accomplished; as, legislatures, courts, armies, taxgatherers, etc, are organs of [[government]].
2. (Science: biology) A [[natural]] [[part]] or [[structure]] in an [[animal]] or a [[plant]], capable of performing some special [[action]] (termed its [[function]]), which is [[essential]] to the [[life]] or [[well]]-[[being]] of the [[whole]]; as, the [[heart]], [[lungs]], etc, are organs of animals; the [[root]], [[stem]], [[foliage]], etc, are organs of [[plants]].
In [[animals]] the organs are generally made up of several [[tissues]], one of which usually [[predominates]], and [[determines]] the [[principal]] [[function]] of the organ. [[Groups]] of organs constitute a [[system]]. See System.
3. A [[component]] [[part]] performing an [[essential]] [[office]] in the working of any [[complex]] [[machine]]; as, the [[cylinder]], [[valves]], crank, etc, are organs of the [[steam engine]].
4. A [[medium]] of [[communication]] between one [[person]] or [[body]] and another; as, the [[secretary]] of [[state]] is the organ of communication between the [[government]] and a [[foreign]] [[power]]; a newspaper is the organ of its editor, or of a party, sect, etc.
5. [Cf. AS. Organ, [[fr]]. L. [[Organum]].
A [[wind]] [[instrument]] containing numerous [[pipes]] of various [[dimensions]] and kinds, which are filled with wind from a [[bellows]], and played upon by [[means]] of keys [[similar]] to those of a piano, and sometimes by [[foot]] keys or [[pedals]]; formerly used in the plural, each pipe [[being]] considired an organ. ''The [[deep]], majestic, solemn organs [[blow]].'' ([[Pope]])
Chaucer used the form orgon as a plural. ''The [[merry]] orgon . . . That in the church goon [go]'' [[Barrel]] organ, Choir organ, Great organ, etc. See Barrel, Choir, etc.
(Science: anatomy) Cabinet organ, a [[passage]] in which the [[tonic]] or [[dominant]] is sustained continuously by one [[part]], while the other parts [[move]].
Origin: L. Organum, Gr.; akin to work, and E. Work: cf. F. Organe. See Work, and cf. Orgue, Orgy.
A fully differentiated structural and functional unit in an animal that is specialized for some particular function.Any functional unit of an organism which combine forces to perform a common role en masse.

Revision as of 03:23, 15 November 2006