/ Dictionary / Index C callosity: Meaning and Definition of Find definitions for: cal•los•i•ty Pronunciation: (ku-los'i-tē), [key] — pl. -ties. a callous condition. a hardened or thickened part of a plant. callus (def. 1a). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: callosity (Thesaurus) callose Callot Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language