/ Dictionary / Index H hydrogenous: Meaning and Definition of Find definitions for: hy•drog•e•nous Pronunciation: (hī-droj'u-nus), [key] — adj. of or containing hydrogen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrogenolysis hydrogen peroxide 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