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platysma

[ pluh-tiz-muh ]
/ pləˈtɪz mə /
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noun, plural pla·tys·mas, pla·tys·ma·ta [pluh-tiz-muh-tuh], /pləˈtɪz mə tə/, Anatomy.
a broad, thin muscle on each side of the neck, extending from the upper part of the shoulder to the corner of the mouth, the action of which wrinkles the skin of the neck and depresses the corner of the mouth.
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Origin of platysma

1685–95; <New Latin <Greek plátysma a plate, literally, something wide and flat, equivalent to platý(nein) to widen (derivative of platýs;see platy-) + -sma, variant of -ma resultative suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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