/ Dictionary / Index O osteosclerosis: Meaning and Definition of Find definitions for: os•te•o•scle•ro•sis Pronunciation: (os"tē-ō-skli-rō'sis), [key] — n. Pathol. abnormal hardening and increase in density of bone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: osteosclerosis (Thesaurus) osteosarcoma osteosis Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language