/ Dictionary / Index H hydrogenolysis: Meaning and Definition of Find definitions for: hy•dro•gen•ol•y•sis Pronunciation: (hī"drō-ju-nol'u-sis), [key] — pl. -ses decomposition of a compound resulting from its interaction with hydrogen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrogenize hydrogenous Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language