/ Dictionary / Index D diapositive: Meaning and Definition of Find definitions for: di•a•pos•i•tive Pronunciation: (dī"u-poz'i-tiv), [key] — n. a positive photographic image produced on a transparent film or glass base. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diapophysis diapsid Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language