Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun ethmoidal_sinus

1 sense of ethmoidal sinus

Sense 1
ethmoid sinus, ethmoidal sinus, sinus ethmoidales -- (a sinus of the meatuses of the nasal cavity (behind the bridge of the nose))
       => sinus -- (any of various air-filled cavities especially in the bones of the skull)