/ Dictionary / Index C coelenteron: Meaning and Definition of Find definitions for: coe•len•ter•on Pronunciation: (si-len'tu-ron"), [key] — pl. -ter•a the body cavity of a coelenterate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: coelenteron (Thesaurus) coelenterate coeliac Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language