/ Dictionary / Index A additive color: Meaning and Definition of Find definitions for: ad'ditive col'or Pronunciation: [key] — Photog. Photog. red, green, or blue-violet, as used in the additive process of color photography. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. additive additive group Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language