/ Dictionary / Index I isenthalpic: Meaning and Definition of Find definitions for: is•en•thal•pic Pronunciation: (ī"sun-thal'pik, ī"zun-), [key] — adj. Thermodynam. pertaining to or characterized by constant enthalpy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Isenstein isentrope Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language