WordNet
ethmoidal sinus
n. a sinus of the meatuses of the nasal cavity (behind the bridge of the nose) [syn: ethmoid sinus, sinus ethmoidales]
Usage examples of "ethmoidal sinus".
The bone splattered, the ethmoidal sinus ruptured into the olfactory bulb, which meant Les Pruel could no longer smell anything, and the copper-pointed slug did a wing-ding puree of the cerebrum taking the top of his head off like an eggshell surrendering to compressed air.