OYSTER

[noun] [C] - a large flat shellfish, some types of which can be eaten either raw or cooked, and other types of which produce pearls (= small round white precious stones)She squeezed lemon on to her eleventh oyster and sucked it up from the shell.Eating oysters is said to make men function better sexually.An oyster bed is an area at the bottom of the sea where oysters are bred either for food or to produce pearls.