nonparticulate radiation(n = noun.phenomenon) electromagnetic radiation, electromagnetic wave - radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge;
is a kind of radiation
has parts: photon
has particulars: actinic radiation, actinic ray, beam, electron beam, ray, black-body radiation, blackbody radiation, hertzian wave, gamma radiation, gamma ray, line, microwave, radio emission, radio radiation, radio wave, roentgen ray, x-radiation, x-ray, x ray

acoustic radiation pressure, actinic radiation, adaptive radiation, alpha radiation, background radiation, beta radiation, black-body radiation, blackbody radiation, corpuscular radiation, cosmic background radiation, cosmic microwave background radiation, cosmic radiation, electromagnetic radiation, electron radiation, gamma radiation, infrared radiation, ionizing radiation, neutron radiation, nonparticulate, particulate radiation, planck's radiation law, radiation, radiation diagram, radiation field, radiation pattern, radiation physics, radiation pressure, radiation pyrometer, radiation sickness, radiation syndrome, radiation therapy, radio radiation, solar radiation, ultraviolet radiation, visible radiation