emission
1. Electromagnetic energy propagated from a source by radiation or conduction.
Note: The emission may be either desired or undesired and may occur anywhere in the electromagnetic spectrum.
2. Radiation produced, or the production of radiation, by a radio transmitting station. For example, the energy radiated by the local oscillator of a radio receiver would not be an emission but a radiation. [NTIA] [RR]
3. The electromagnetic energy radiated from an antenna. [47CFR]