/ Dictionary / Index S sex chromatin: Meaning and Definition of Find definitions for: sex' chro"matin Pronunciation: [key] — Genetics. Genetics. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sex change sex chromosome Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language