/ Dictionary / Index C co-ordinal: Meaning and Definition of Find definitions for: co-or•di•nal Pronunciation: (kō-ôr'dn-l), [key] — adj. Biol. belonging to the same order. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coopt coordinate Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language