pearl oyster

noun
any of several marine bivalve mollusks of the family Pteriidae, some of which form pearls of great value, inhabiting waters of eastern Asia and off the coasts of Panama and Baja California.

Origin:
1685–95

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pearl oyster
 
n
any of various tropical marine bivalves of the genus Pinctada and related genera: a major source of pearls

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
In aquaculture, technologies are being developed for the production of fresh water prawns and pearl oyster.
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