/ Dictionary / Index Q quinonoid: Meaning and Definition of Find definitions for: quin•o•noid Pronunciation: (kwin'u-noid", kwi-nō'noid), [key] — adj. Chem. of or resembling quinone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quinonimine quinoxaline Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language