ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  radio emission - an electromagnetic wave with a wavelength between 0.5 cm to 30,000 melectromagnetic radiation, electromagnetic wave, nonparticulate radiation - radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge sky wave - a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface ground wave - a radio wave propagated on or near the earth's surface radio signal - a radio wave used to transmit and receive messages radio spectrum, radio-frequency spectrum - the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television carrier wave, carrier - a radio wave that can be modulated in order to transmit a signal short wave - a radio wave with a wavelength less than 100 meters (a frequency greater than 3 megahertz) medium wave - a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz) long wave - a radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz) |
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