bivalve vs oyster

bivalve

noun
  • Any mollusc belonging to the taxonomic class Bivalvia, characterized by a shell consisting of two hinged sections, such as a scallop, clam, mussel or oyster. 

  • A pericarp in which the seed case opens or splits into two parts or valves. 

oyster

noun
  • Any of certain marine bivalve mollusks, especially those of the family Ostreidae (the true oysters), usually found adhering to rocks or other fixed objects in shallow water along the seacoasts, or in brackish water in the mouth of rivers. 

  • A person who keeps secrets. 

  • A shoplifter. 

  • A pale beige color tinted with grey or pink, like that of an oyster. 

  • The delicate morsel of dark meat contained in a small cavity of the bone on each side of the lower part of the back of a fowl. 

adj
  • Of a pale beige colour tinted with grey or pink, like that of an oyster. 

verb
  • To fish for oysters. 

How often have the words bivalve and oyster occurred in a corpus of books? (source: Google Ngram Viewer )