/ Dictionary / Index C cymatium: Meaning and Definition of Find definitions for: cy•ma•ti•um Pronunciation: (si-mā'shē-um, sī-), [key] — pl. -ti•a the uppermost member of a classical cornice or of a cornice of similar form: usually a cyma recta in classical examples. Cf. sima. echinus (def. 2c). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cymatium (Thesaurus) cymation cymbal Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language