/ Dictionary / Index C callose: Meaning and Definition of Find definitions for: cal•lose Pronunciation: (kal'ōs), [key] — adj. having thickened or hardened spots, as a leaf. —n. callus (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. callosal callosity Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language