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Medical Term:

frontal sinus


Definition: a hollow paranasal sinus formed on either side in the lower part of the squama of the frontal bone; it communicates by the ethmoidal infundibulum with the middle meatus of the nasal cavity of the same side.

Synonym(s): sinus frontalisTA

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.