oyster

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.

(figurative) Something at one's disposal.

Any of the fungi in the genera Pleurotus, Hohenbuehelia, or other related genera.

(UK, slang) Ellipsis of Oyster card.

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

The delicate oyster-shaped 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.

(informal) A person who keeps secrets.

(UK, slang) A shoplifter.

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

To fish for oysters.