(which may stand for autoradiogram, autoradiograph or autoradiography) – it is the film exposed by a radioactive tracer.

Common term for "Autoradiograph," the final product in a DNA analysis. Autorads, which look very much like bar-codes, are formed by the reaction of electricity with genetic material (DNA). This reaction is unique to each sample of genetic material, providing an invaluable tool for identification. The reaction takes place on a nylon membrane which is photographed against x-ray film.