developer
De*vel"op*er, n. 1. One who, or that which, develops. 2. (Photog.) Defn: A reagent by the action of which the latent image upon a photographic plate, after exposure in the camera, or otherwise, is developed and visible.
De*vel"op*er, n. 1. One who, or that which, develops. 2. (Photog.) Defn: A reagent by the action of which the latent image upon a photographic plate, after exposure in the camera, or otherwise, is developed and visible.