/ Dictionary / Index Q quinoid: Meaning and Definition of Find definitions for: quin•oid Pronunciation: (kwin'oid), [key] — Chem. Chem. —n. a quinonoid substance. —adj. quinonoid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quinoa quinoidine Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language