/ Dictionary / Index A allomerism: Meaning and Definition of Find definitions for: al•lom•er•ism Pronunciation: (u-lom'u-riz"um), [key] — n. Chem. variability in chemical constitution without change in crystalline form. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: allomerism (Thesaurus) allograph allomerize Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language