/ Dictionary / Index F facial index: Meaning and Definition of Find definitions for: fac'ial in"dex Pronunciation: [key] the ratio of the breadth of a face to its height. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. facial angle facial nerve Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language