Synonyms and Antonyms for ethmoidal-sinus

1. ethmoidal sinus (n.)

a sinus of the meatuses of the nasal cavity (behind the bridge of the nose)

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2. sinus (n.)

an abnormal passage leading from a suppurating cavity to the body surface

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4. sinus (n.)

any of various air-filled cavities especially in the bones of the skull

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