/ Dictionary / Index O osteosis: Meaning and Definition of Find definitions for: os•te•o•sis Pronunciation: (os"tē-ō'sis), [key] — n. the formation of bony tissue, usually infiltrating connective tissue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. osteosclerosis osteotome Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language