Definition of bivalve in English:



  • An aquatic mollusc which has a compressed body enclosed within a hinged shell, such as oysters, mussels, and scallops.

    Class Bivalvia (formerly Pelecypoda or Lamellibranchia)

    Also called pelecypod or lamellibranch
    • ‘This pattern was documented for both bivalves and gastropods and continued from the mid to late Paleocene until the early Eocene.’
    • ‘Many bivalves (such as clams or oysters) are used as food in places all over the world.’
    • ‘Marine invertebrates include ammonites, echinoderms, bivalves and crustaceans, but infaunal elements are rare.’
    • ‘Shell fragments of bivalves and gastropods are common in Neogene shallow-water deposits.’
    • ‘Most shells were bivalves, especially clams and some mussels.’
    • ‘Despite their unusual features, it is generally believed that the closest relatives of scaphopods are the bivalves.’
    • ‘Mussels, like other bivalves, obtain all their nutrients - including iron - by filtering them from the water.’
    • ‘Both species of crayfish readily ate native bivalves.’
    • ‘It was thought that this behavior was an adaptation for desiccation resistance analogous to the closed shells of bivalves.’
    • ‘Many bivalves and brachiopods possess multilayered shells.’
    • ‘However, early calapids in the Cretaceous were smaller in size and are not considered as major predators of bivalves and gastropods.’
    • ‘Finally, there was disagreement over how many major subdivisions were recognized within the bivalves.’
    • ‘There is no evidence for trans-Panthalassan dispersal of bivalves in low latitudes within the interval of Ladinian coral beds.’
    • ‘Freshwater bivalves, snails, and branchiopod Crustacea were common.’
    • ‘Some sponges bore into the shells of bivalves, gastropods, and the colonial skeletons of corals by slowly etching away chips of calcareous material.’
    • ‘Many modern gastropods and bivalves respond to increased temperature by increasing both shell and soft tissue growth rates.’
    • ‘Based on gastropods, bivalves, and planktonic foraminifera, Kilmer assigned this formation to the Turonian.’
    • ‘Notable is the relative rarity of bivalves and gastropods, consistent with a deeper water environment.’
    • ‘As in most bivalves, the shell is composed of three layers: the periostracum, the prismatic layer, and the nacre.’
    • ‘A bivalve closes its shells by contracting its powerful adductor muscles.’


  • 1(of a mollusc or other aquatic invertebrate) having a hinged double shell.

    • ‘Thus, they are mechanically much weaker than other bivalve shells and are easily fragmented after break-down of the organic matter.’
    • ‘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.’
    • ‘This makes brachiopods look superficially like bivalved molluscs (clams, oysters, etc.)’
    • ‘However, as early as 1923 Collip reported finding insulin-like activity in a bivalve mollusc, Mya arenaria.’
    • ‘Generally fast-growing bivalved molluscs originated in near-shore environments, and later joined slower growing brachiopods offshore.’
    • ‘Large, relatively well-preserved bivalve shells, rhodoliths and nodular bryozoans (several centimetres in size) occur together with volcanic pebbles, at the front of the landward-dipping beds.’
    • ‘In many bivalve shells, growth lines become closely spaced in the late growth stage, accompanied by prominent shell inflation and thickening of the shell.’
    • ‘One of these is the bivalves (sometimes called pelecypods or lamellibranchs), an important group of bivalved molluscs familiar to all from the numerous shells that litter beaches.’
    • ‘The hinge ligament of bivalve shell is an example of a complex development.’
    • ‘Sea urchins, like bivalve molluscs, are cosmopolitan in their distribution and by selecting a range of species a regular supply of gametes can be obtained for laboratory testing purposes.’
    • ‘This type of ornamentation is often found in crustaceans including Daphnia, many species of ostracodes, and other Cambrian bivalved arthropods such as Isoxys.’
    • ‘We continue to use these techniques for the isolation of new genes involved in physiological processes in fish and bivalve molluscs.’
    • ‘Many suspension-feeding marine bivalve molluscs live in variable environments such as estuaries and shallow coastal waters.’
    • ‘Bradoriids are small bivalved arthropods, historically considered to be the oldest members of the Ostracoda.’
    • ‘The smaller waders will feed on the bivalve molluscs and the little worms and that that are actually in the mud and sand.’
    • ‘These and other studies from native habitats have demonstrated that green crabs have a broad diet range, but that bivalve molluscs generally make up the largest part of their diet.’
    • ‘Other species take refuge in a protective structure surrounding their body, such as polychaete tubeworms, caddis fly larvae, gastropod and bivalve mollusks, hermit crabs, barnacles, turtles, and armadillos.’
    • ‘Additional studies are required to resolve questions of vitellogenin regulation and the role of estrogens in bivalve molluscs.’
    • ‘The beach sands are dominated by shells of bivalve mollusks, mainly venerids, gastropods, and echinoderms.’
    • ‘The only bivalve group having comparable hinge features is the Philobryidae (Arcoida, Limopsoidea).’
  • 2Botany
    Having two valves.

    • ‘The soybean plant is called a legume because it produces a bivalve pod or fruit.’
    • ‘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.’