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Fig-shell :: Fig-shell (n.) A marine univalve shell of the genus Pyrula, or Ficula, resembling a fig in form..

Valve :: Valve (n.) A lid, plug, or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid..

Eye :: Eye (n.) The scar to which the adductor muscle is attached in oysters and other bivalve shells; also, the adductor muscle itself, esp. when used as food, as in the scallop..

Pandora :: Pandora (n.) A genus of marine bivalves, in which one valve is flat, the other convex..

Quadrivalve :: Quadrivalve (a.) Dehiscent into four similar parts; four-valved; as, a quadrivalve pericarp..

Blow Valve :: Blow valve () See Snifting valve.

Pearl :: Pearl (n.) A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Pearls which are round, or nearly round, and of fine luster, are highly esteemed

Silique :: Silique (n.) An oblong or elongated seed vessel, consisting of two valves with a dissepiment between, and opening by sutures at either margin. The seeds are attached to both edges of the dissepiment, alternately upon each side of it..

Astarte :: Astarte (n.) A genus of bivalve mollusks, common on the coasts of America and Europe..

Shipworm :: Shipworm (n.) Any long, slender, worm-shaped bivalve mollusk of Teredo and allied genera. The shipworms burrow in wood, and are destructive to wooden ships, piles of wharves, etc. See Teredo..

Sutured :: Suture (n.) A seam, or impressed line, as between the segments of a crustacean, or between the whorls of a univalve shell..

Valve :: 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..

Sluice :: Sluice (n.) An artifical passage for water, fitted with a valve or gate, as in a mill stream, for stopping or regulating the flow; also, a water gate or flood gate..

Lead :: Lead (n.) The width of port opening which is uncovered by the valve, for the admission or release of steam, at the instant when the piston is at end of its stroke..

Siphon :: Siphon (n.) One of the tubes or folds of the mantle border of a bivalve or gastropod mollusk by which water is conducted into the gill cavity. See Illust. under Mya, and Lamellibranchiata..

Gate :: Gate (n.) A door, valve, or other device, for stopping the passage of water through a dam, lock, pipe, etc..

Rock Shaft :: Rock shaft () A shaft that oscillates on its journals, instead of revolving, -- usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; -- called also rocker, rocking shaft, and way shaft..

String :: String (n.) The tough fibrous substance that unites the valves of the pericap of leguminous plants, and which is readily pulled off; as, the strings of beans..

Stopcock :: Stopcock (n.) A bib, faucet, or short pipe, fitted with a turning stopper or plug for permitting or restraining the flow of a liquid or gas; a cock or valve for checking or regulating the flow of water, gas, etc., through or from a pipe, etc..

Valvular :: Valvular (a.) Of or pertaining to a valve or valves; specifically (Med.), of or pertaining to the valves of the heart; as, valvular disease..

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