The definition of a diapositive is a positive photographic image on a transparent material such as glass or film.
An example of diapositive is a photographic slide.
See diapositive in Webster's New World College Dictionary
noun
Browse entries near diapositive
diaphoretic
diaphragm
diaphysis
diapir
diapophysis
diapsid
diarchy
diaristic
diarist
diarrhea