单词	bivalve
释义	bivalve /ˈbʌɪvalv / noun An aquatic mollusc which has a compressed body enclosed within a hinged shell, such as oysters, mussels, and scallops. Also called pelecypod or lamellibranch. Class Bivalvia (formerly Pelecypoda or Lamellibranchia). Shell fragments of bivalves and gastropods are common in Neogene shallow-water deposits.... Some sponges bore into the shells of bivalves, gastropods, and the colonial skeletons of corals by slowly etching away chips of calcareous material. Based on gastropods, bivalves, and planktonic foraminifera, Kilmer assigned this formation to the Turonian. adjective (also bivalved) 1(Of a mollusc or other aquatic invertebrate) having a hinged double shell.This makes brachiopods look superficially like bivalved molluscs (clams, oysters, etc.)... In bivalve molluscs, growth rate of the shell tends to decelerate with growth and the shell generally becomes more inflated in the late growth stage. The hinge ligament of bivalve shell is an example of a complex development. 2 Botany Having two valves.There is a large class of plants which have their seeds enclosed in a sort of bivalve pericarp, usually called a "pod."... The bean seed grows in a bivalve pod called a legume. The soybean plant is called a legume because it produces a bivalve pod or fruit.
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