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Any of several marine bivalve mollusks of the family Pteriidae and especially of the genus Pinctada that produce commercially harvested pearls.
(Animals) any of various tropical marine bivalves of the genus Pinctada and related genera: a major source of pearls
any of several marine bivalve mollusks of the family Pteriidae, inhabiting tropical waters, some of which form pearls of great value.
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|Noun||1.||pearl oyster - tropical marine bivalve found chiefly off eastern Asia and Pacific coast of North America and Central America; a major source of pearls|
oyster - marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters