(radioautography) n. a technique for examining the distribution of a radioactive *tracer in the tissues of an experimental animal. The tracer is injected into the animal, which is killed after a certain period. Thin sections of its organs are placed in close contact with a radiation-sensitive material, such as a photographic emulsion, and observed under a microscope. Blackening of the film indicates a high concentration of radioactive material.... autoradiography
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