Becquerel ray, Grenz ray, Roentgen ray, X radiation, X ray, actinic ray, actinism, alpha radiation, alpha ray, anode ray, atomic beam, atomic ray, beam, beam of light, beta radiation, beta ray, canal ray, cathode ray, cosmic radiation, cosmic ray, cosmic ray bombardment, electron emission, gamma radiation, gamma ray, gleam, infrared ray, infraroentgen ray, invisible radiation, leam, nuclear rays, patch, pencil, photon, positive ray, radiation, ray, ray of light, ribbon, ribbon of light, solar rays, streak, stream, stream of light, streamer, ultraviolet ray, violet ray