n.[C]

1. 【动】牡蛎；蚝
   Some kinds of oyster are used as food, and others yield pearls.

   有几种牡蛎可食用，有几种可产珍珠。

2. 【口】沉默寡言的人；嘴紧的人

n.

1. a bivalve marine mollusc with a rough, flattened, irregularly oval shell, several kinds of which are farmed for food or pearls. [Ostrea edulis (Europe), Crassostrea virginica (America), and other species.]
2. a shade of greyish white.
3. an oval morsel of meat on each side of the backbone in poultry.