/ Dictionary / Index C cuspidal: Meaning and Definition of Find definitions for: cus•pi•dal Pronunciation: (kus'pi-dl), [key] — adj. of, like, or having a cusp; cuspidate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cuspidal (Thesaurus) cuspid cuspidate Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language