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paranasal sinus

DEFINITIONS OF: paranasal sinus

1

n any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with the lining of the nasal cavities

Synonyms:
nasal sinus, sinus paranasales
Type of:
sinus
any of various air-filled cavities especially in the bones of the skull
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