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Bivalve   /bˈaɪvˌælv/   Listen
noun
Bivalve  n.  
1.
(Zool.) 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 shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, or by one, as in the oyster. See Mollusca.
2.
(Bot.) A pericarp in which the seed case opens or splits into two parts or valves.


adjective
Bivalve  adj.  (Zool. & Bot.) Having two shells or valves which open and shut, as the oyster and certain seed vessels.





Collaborative International Dictionary of English 0.48


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"Bivalve" Quotes from Famous Books



... parts of a bivalve shell are like thin saucers, concave inside, convex outside. The inside is smooth, polished. The outside is rougher, sometimes with graceful ribs or concentric ridges or combinations of both. Univalves are conical and spiraling, ...
— Let's collect rocks & shells • Shell Oil Company
... ploughed up in the chalky fields, near the side of the down, and given to me for the singularity of its appearance, which, to an incurious eye, seems like a petrified fish of about four inches long, the cardo passing for an head and mouth. It is in reality a bivalve of the Linnaean genus of Mytilus, and the species of Crista Galli; called by Lister, Rastellum; by Rumphius, Ostreum plicatum minus; by D'Argenville, Auris Porci, s. Crista Galli, and by those who make collections cock's comb. ...
— The Natural History of Selborne • Gilbert White
... acquainted with what is passing on around, and as he is much more active and alert than his companion he sees danger much farther away, and gives notice of it, asking for the door to be shut by lightly pinching the mussel's gill. But this gratitude of the Crustacean towards a sympathetic bivalve is merely a hypothesis; we do not exactly know what passes in the intimacy of these two ...
— The Industries of Animals • Frederic Houssay
... folds itself together, so that the little animal acquires the aspect of a bivalve shell, the foremost limbs become transformed into very peculiar adherent feet ("prehensile antennae," Darwin), and the two following pairs are cast off; like the frontal horns. On the abdomen six pairs of powerful ...
— Facts and Arguments for Darwin • Fritz Muller
... officials. On the Isthmus as elsewhere "John" is a law-abiding citizen—within limits; never obsequious, nearly always friendly, ready to answer questions quite cheerily so long as he considers the matter any of your business, but closing infinitely tighter than the maltreated bivalve when he fancies ...
— Zone Policeman 88 - A Close Range Study of the Panama Canal and its Workers • Harry A. Franck


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