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One of the siphons of a bivalve mollusk. Capillary tube, a tube of very fine bore. See Capillary. -- Fire tube (Steam Boilers), a tube which forms a flue. -- Tube coral. (Zoöl.) Same as Tubipore. -- Tube foot (Zoöl.), one of the ambulacral suckers of an echinoderm. -- Tube plate, or Tube sheet (Steam Boilers), a fl…

Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell.

A large, handsomely colored, marine univalve shell (Fasciolaria tulipa) native of the Southern United States. The name is sometimes applied also to other species of Fasciolaria.

onceal the face of; as, to turn down cards. (c) To lower, or reduce in size, by turning a valve, stopcock, or the like; as, turn down the lights. -- To turn in. (a) To fold or double under; as, to turn in the edge of cloth. (b) To direct inwards; as, to turn the toes in when walking. (c) To contribute; to deliver up;…

stion engine in which the admission of the mixture to the crank case is through a suction valve.

A fold of the wall which projects into the cavity of the intestine in bivalve mollusks, certain annelids, starfishes, and some other animals.

One of the lateral prominence just above the hinge of a bivalve shell.

Closed from beneath. Undershut valve (Mach.), a valve which shuts by being lifted against a seat facing downward. Knight.

Having only one adductor muscle, and one muscular impression on each valve, as the oyster; monomyarian.

Same as Univalve, a.

s and exhausted, for the passage of the electrical discharge; a Geissler tube. -- Vacuum valve, a safety valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse. -- Torricellian vacuum. See under Torricellian.

Resembling, or serving as, a valve; consisting of, or opening by, a valve or valves; valvular.

A little valve or fold; a valvelet; a valvule.

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

A little valve; a valvelet.

One of the prominent ridges or ribs extending across each of the whorls of certain univalve shells.

An exuberant morbid outgrowth upon any part, especially upon the valves of the heart. Vegetation of salts (Old Chem.), a crystalline growth of an arborescent form.

Any larval gastropod or bivalve mollusk in the state when it is furnished with one or two ciliated membranes for swimming.

An extensive tribe of bivalve mollusks of which the genus Venus is the type. The shells are usually oval, or somewhat heartshaped, with a conspicuous lunule. See Venus.

oöl.) (a) A spiral shell having the body whorls rounded or swollen in the middle. (b) A bivalve shell in which the valves are strongly convex.