/ Dictionary / Index P phenylhydrazine: Meaning and Definition of Find definitions for: phen•yl•hy•dra•zine Pronunciation: (fen"l-hī'dru-zēn", -zin, fēn"-), [key] — n. Chem. a yellow, poisonous liquid or low-melting solid, CHN, used in chemical analysis and organic synthesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phenyl group phenylic acid Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language