/ Dictionary / Index C cotidal: Meaning and Definition of Find definitions for: co•tid•al Pronunciation: (kō-tīd'l), [key] — adj. pertaining to a coincidence of tides. (on a chart or map) indicating a line connecting points at which high tide occurs at the same time. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cothurnus cotillion Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language