/ Dictionary / Index Q quaternate: Meaning and Definition of Find definitions for: quat•er•nate Pronunciation: (kwot'ur-nāt", kwu-tûr'nit), [key] — adj. arranged in or consisting of four parts, as the leaves of certain plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quaternate (Thesaurus) quaternary ammonium compound quaternion Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language