/ Dictionary / Index I isopropyl group: Meaning and Definition of Find definitions for: isopro'pyl group" Pronunciation: [key] — Chem. Chem. the univalent group CH, an isomer of the propyl group. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isopropyl ether isopropylideneacetone Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language