Definitions for "Mother of pearl"
The iridescent substance that forms the lining of the shells of some fresh- and salt-water mollusks. Also referred to as “nacre.” Chief sources are the pearl oyster, found in warm and tropical seas, mainly in Asia; freshwater pearl mussels, which live in many rivers of the United States, Europe, and Asia; and the abalone of California, Japan, and other Pacific regions.
Mother of pearl” is the pearl lining of an oyster. Only mollusks that have this lining can produce pearls. This lining is also used as inlay in jewelry and other ornamental items.
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