/ Dictionary / Index A aerosinusitis: Meaning and Definition of Find definitions for: aer•o•si•nus•i•tis Pronunciation: (âr"ō-sī"nu-sī'tis), [key] — n. Med. inflammation of the nasal sinuses caused by the effect on the sinuses of changes in atmospheric pressure. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aeroscepsy aerosol Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language