/ Dictionary / Index P photoheliograph: Meaning and Definition of Find definitions for: pho•to•he•li•o•graph Pronunciation: (fō"tu-hē'lē-u-graf", -gräf"), [key] — n. Astron. an instrument for photographing the sun, consisting of a camera and a specially adapted telescope. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photogravure photoinduced Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language