/ Dictionary / Index A actinograph: Meaning and Definition of Find definitions for: ac•tin•o•graph Pronunciation: (ak-tin'u-graf", -gräf"), [key] — n. a recording actinometer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. actinogram actinoid Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language