any of various bivalve mollusks with an irregularly shaped, unequal shell, living attached to rocks, other shells, etc., and widely used as food
the soft, edible part of such a mollusk
the oyster-shaped bit of meat contained in a depression on each side of the pelvic bone of a fowl
something from which profit or advantage can be extracted: the world is my oyster
Informal a taciturn person
intransitive verb
to gather, raise, or dredge oysters
See oyster in American Heritage Dictionary 4
(oiˈstər)
noun
a. Any of several edible bivalve mollusks of the family Ostreidae, especially of the genera Crassostrea and Ostrea, that live chiefly in shallow marine waters and have a rough, irregularly shaped shell.
b. 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.
a. A special delicacy.
b. Something from which benefits may be extracted.