Paranasal sinus Moderate

Origin: Greek prefix para-

Paranasal sinus has 2 different meanings across 1 category:

Definitions

Noun

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

paranasal sinus sinus paranasales nasal sinus

Any of a number of air-filled spaces, or sinuses, within the bones of the skull and face.