/ Dictionary / Index I isopiestic: Meaning and Definition of Find definitions for: i•so•pi•es•tic Pronunciation: (ī"sō-pī-es'tik), [key] — adj. of or noting equal pressure; isobaric. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isophthalic acid isoplastic graft Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language