/ Dictionary / Index A actinogram: Meaning and Definition of Find definitions for: ac•tin•o•gram Pronunciation: (ak-tin'u-gram"), [key] — n. the record produced by the action of an actinograph. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. actinodrome actinograph 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