Definition of valve

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Valve (n.) One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves..

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Columbella :: Columbella (n.) A genus of univalve shells, abundant in tropical seas. Some species, as Columbella mercatoria, were formerly used as shell money..
Trumpet :: Trumpet (n.) A wind instrument of great antiquity, much used in war and military exercises, and of great value in the orchestra. In consists of a long metallic tube, curved (once or twice) into a convenient shape, and ending in a bell. Its scale in the lower octaves is limited to the first natural harmonics; but there are modern trumpets capable, by means of valves or pistons, of producing every tone within their compass, although at the expense of the true ringing quality of tone..
Lithodome :: Lithodome (n.) Any one of several species of bivalves, which form holes in limestone, in which they live; esp., any species of the genus Lithodomus..
Trochus :: Trochus (n.) Any one of numerous species of marine univalve shells belonging to Trochus and many allied genera of the family Trochidae. Some of the species are called also topshells.
Air Gun :: Air gun () A kind of gun in which the elastic force of condensed air is used to discharge the ball. The air is powerfully compressed into a reservoir attached to the gun, by a condensing pump, and is controlled by a valve actuated by the trigger..
Cockleshell :: Cockleshell (n.) One of the shells or valves of a cockle.
Univalvular :: Univalvular (a.) Same as Univalve, a..
Tube-shell :: Tube-shell (n.) Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell..
Slide :: Slide (n.) A slide valve.
Cockle :: Cockle (n.) A bivalve mollusk, with radiating ribs, of the genus Cardium, especially C. edule, used in Europe for food; -- sometimes applied to similar shells of other genera..
Beak :: Beak (n.) The prolongation of certain univalve shells containing the canal.
Multivalvular :: Multivalvular (a.) Having many valves.
Pholas :: Pholas (n.) Any one of numerous species of marine bivalve mollusks of the genus Pholas, or family Pholadidae. They bore holes for themselves in clay, peat, and soft rocks..
Multivalve :: Multivalve (a.) Alt. of Multivalvula.
Lamellibranchiata :: Lamellibranchiata (n. pl.) A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc..
Equivalvular :: Equivalvular (a.) Same as Equivalve or Equivalved.
Ambitus :: Ambitus (n.) The exterior edge or border of a thing, as the border of a leaf, or the outline of a bivalve shell..
Multivalve :: Multivalve (n.) Any mollusk which has a shell composed of more than two pieces.
Summitless :: Summit (n.) The most elevated part of a bivalve shell, or the part in which the hinge is situated..
Organ :: Organ (n.) 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..
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