n. the process of producing an autoradiogram by exposing photographic film to a radioactive substance in close proximity to the film. [ PJC ]
n. Art or process of making radiographs, radiograms, or autoradiograms. -- ra`di*o*graph"ic ra`di*o*graph"ic*al a. -- Ra`di*o*graph"ic*al*ly, adv. [Webster 1913 Suppl.]