DAGUERREOTYPE n.
An early variety of photograph, produced on a silver plate, or copper plate covered with silver, and rendered sensitive by the action of iodine, or iodine and bromine, on which, after exposure in the camera, the latent image is developed by the vapor of mercury.
DECATHLON n.
mpic Games, a composite contest consisting of a 100-meter run, a broad jump, putting the shot, a running high-jump, a 400-meter run, throwing the discus, a 100-meter hurdle race, pole vaulting, throwing the javelin, and a 1500-meter run.
DEVELOPMENT n.
nfolding process by which anything is developed, as a plan or method, or an image upon a photographic plate; gradual advancement or growth through a series of progressive changes; also, the result of developing, or a developed state. A new development of imagination, taste, and poetry. Channing.