/ Dictionary / Index O osteoarthrosis: Meaning and Definition of Find definitions for: os•te•o•ar•thro•sis Pronunciation: (os"tē-ō-är-thrō'sis), [key] — n. chronic, noninflammatory arthritis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. osteoarthritis osteoblast Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language