Also found in: Thesaurus, Medical, Idioms, Encyclopedia, Wikipedia. Any of oyster stew canned edible bivalve mollusks of the family Ostreidae, having a rough, irregularly shaped shell attached to the substrate in shallow marine waters.

Oysters are widely cultivated for food. Any of various similar or related bivalve mollusks, such as the pearl oyster. An edible bit of muscle found in the hollow of the pelvic bone of a fowl. Something from which benefits may be extracted.

To gather, dredge for, or raise oysters. Dictionary of the English Language, Fifth Edition. 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. Ostreidae, having an irregularly shaped shell. Copyright 2005, 1997, 1991 by Random House, Inc. Any of several mollusks of shallow waters, having a rough, irregularly shaped, double-hinged shell.