| 释义 |
opening of frontal sinus opening of frontal sinus [TA] one of a pair of orifices in the floor of the frontal sinuses in the nasal part of the frontal bone, through which the frontal sinuses communicate with the ethmoidal infundibulum via the frontonasal duct. Synonym(s): apertura sinus frontalis [TA], frontal sinus aperture |