paranasal sinus

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Related to Air sinus: frontal sinus
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Noun1.paranasal sinus - 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 cavitiesparanasal sinus - 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
sinus - any of various air-filled cavities especially in the bones of the skull
References in periodicals archive ?
Mastoid air sinus abnormalities associated with lateral sinus thrombosis: Cause or consequence?
It entered through his left eye pushing the eyeball to the side and smashing the socket before lodging in an air sinus.
The weight penetrated his left eye, smashing the socket before lodging in an air sinus.