/ Dictionary / Index Z zenithal equidistant projection: Meaning and Definition of Find definitions for: ze'nithal equidis'tant projec'tion. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zenithal zenith distance Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language