珠母贝 zhūmǔbèi pearl oyster Origin Definitions Defs Strokes Stroke Words Sentences Sents 珠母 zhūmǔ pearl oyster any of several species of bivalve mollusks that produce pearls, such as those in the genus Pinctada贝 貝 bèi noun shellfish shellfish; shelled mollusks such as clams and snails; a shell or cowrie