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Definition of Pearl oyster
1. Noun. Tropical marine bivalve found chiefly off eastern Asia and Pacific coast of North America and Central America; a major source of pearls.
Exact synonyms: Pinctada Margaritifera
Generic synonyms: Oyster
Group relationships: Genus Pinctada, Pinctada
Generic synonyms: Oyster
Group relationships: Genus Pinctada, Pinctada
Definition of Pearl oyster
1. Noun. Any of several bivalve molluscs that are a source of pearls, but especially ''Pinctada margaritifera'' ¹
¹ Source: wiktionary.com