/ Dictionary / Index I isoprenoid: Meaning and Definition of Find definitions for: i•so•pren•oid Pronunciation: (ī"su-prē'noid), [key] — adj. Chem. pertaining to, derived from, or similar to isoprene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isoprene isopropanol Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language