hinge of a bivalve shell

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• Bivalve shell — The bivalve shell is one kind of seashell, and in life it is composed of two parts, two valves. The bivalve shell is part of the body, the exoskeleton, of a bivalve mollusk. Bivalves are a common part of the marine fauna worldwide (scallops,… …   Wikipedia

• hinge — [hinj] n. [ME, earlier henge (vowel raised before nasal) < hengen (< ON hengja) or < hangen: see HANG] 1. a joint or device on which a door, gate, lid, etc. swings 2. a natural joint, as of the bivalve shell of a clam or oyster 3. a thin …   English World dictionary

• bivalve — bivalvular /buy val vyeuh leuhr/, adj. /buy valv /, n. 1. Also called lamellibranch. Zool. any mollusk, as the oyster, clam, scallop, or mussel, of the class Bivalvia, having two shells hinged together, a soft body, and lamellate gills. adj. 2.… …   Universalium

• hinge — hingeless, adj. hingelike, adj. /hinj/, n., v., hinged, hinging. n. 1. a jointed device or flexible piece on which a door, gate, shutter, lid, or other attached part turns, swings, or moves. 2. a natural anatomical joint at which motion occurs… …   Universalium

• hinge — /hɪndʒ / (say hinj) noun 1. the movable joint or device on which a door, gate, shutter, lid, etc., turns or moves. 2. a natural anatomical joint at which motion occurs about a transverse axis, as that of the knee or a bivalve shell. 3. that on… …  

• hinge — n. & v. n. 1 a a movable, usu. metal, joint or mechanism such as that by which a door is hung on a side post. b Biol. a natural joint performing a similar function, e.g. that of a bivalve shell. 2 a central point or principle on which everything… …   Useful english dictionary

• hinge line — noun also hinge 1. a. : an imaginary line on the earth s surface which can be regarded as a boundary between a stable region and one undergoing upward or downward movement b. : a line around which one wall of a fault may appear to have rotated… …   Useful english dictionary

• hinge tooth — noun : projection of one valve of a bivalve shell that is located near the hinge line and that fits into a corresponding indentation in the other valve …   Useful english dictionary

• hinge ligament — Elastic substance interlocking the valves of a bivalve shell …   Dictionary of invertebrate zoology

• Bivalve — Bi valve, n. [F. bivalve; bi (L. bis) + valve valve.] 1. (Zo[ o]l.) A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth …   The Collaborative International Dictionary of English

• Mollusc shell — Closed and open shells of a marine bivalve, Petricola pholadiformis. A bivalve shell is composed of two hinged valves which are joined by a ligament …   Wikipedia