/ Dictionary / Index A ateleiosis: Meaning and Definition of Find definitions for: a•te•lei•o•sis Pronunciation: (u-tē"lē-ō'sis), [key] — n. Pathol. ateliosis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ateleiosis (Thesaurus) atelectasis atelier Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language