/ Dictionary / Index C cranial index: Meaning and Definition of Find definitions for: cra'nial in'dex Pronunciation: [key] — Craniom. Craniom. cephalic index. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cranial cranial nerve Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language