Denoting radio waves or broadcasting
The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages
A radio or radio transceiver set in the dashboard of a motor vehicle and powered by the vehicle's battery.
A map showing locations of radio stations (now rare).
A system of intercommunicating radio sets, operated especially by a police force or other organization.
The sky as observed at radio wavelengths.
The sun as observed at radio wavelengths.
A very small radio transmitter that can be attached to an object, animal, etc., to enable its location to be tracked from the radio signals it transmits.
To attach a very small radio transmitter to (especially an animal) for the purposes of location tracking.
A van fitted with direction-finding equipment for the purposes of identifying radio licence evaders (now historical).
A car, especially a police car, equipped with a two-way radio
= pedal wireless.
A burglar alarm, fire alarm, etc., which transmits a radio signal to a remote location when triggered.
A radioactive atom; an atom of a radionuclide.
A brief emission or transmission of radio waves; (Astronomy) a short-lived emission of unusually intense radio signals from a celestial object (in the case of the sun, often as an accompaniment to a solar flare).
A combined clock and radio; specifically = radio alarm clock.
A rotatable disc or knob on a radio used to tune into various radio stations or networks.
A concave reflector designed to detect radio waves, especially as part of a radio telescope.
A diffuse region of radio-emitting material surrounding an object such as a radio galaxy or a pulsar.
= radio jockey.
= radio microphone.
Noise at radio wavelengths; radio signals that seem to be random or to carry no information.
A small device which uses radio signals to transmit measurements (of pressure, temperature, pH, etc.), especially from within the body; an endoradiosonde or radiotelemetry capsule.
A play performed and broadcast on radio.
A very brief radio signal; a pulse of radio waves, especially from a celestial object.
Emitting a negligible quantity of radio waves; characterized by little radio emission.
Radar that uses radio waves (rare).
The distance or area within which reception of a radio signal or broadcast is possible.
A small building or (especially Nautical) room housing radio equipment.
An exhibition of radio equipment.
A popular performer on radio broadcasts; a radio celebrity.
Talk or conversation via the medium of radio, especially two-way radio.
A two-way radio for personal communication; = transceiver.
A combined bedside radio and alarm clock, which can be set so that the radio will come on at the desired time
A modified or shortened version of a song that is suitable for broadcasting
An electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication
A type of radio broadcast in which the presenter talks about topical issues and encourages listeners to phone in to give their opinions
A radio for receiving analogue signals which incorporates either a digital tuning mechanism or a digital display (or frequently both). Now rare.
A portable radio transceiver used for communication; the broadcasting network of such radios.
Audio programmes or channels which are made available to listeners online, typically via streaming; the activity or industry associated with this.
A person who picks up or transmits radio messages as a hobby.
Emitting radio waves in significant quantities; = radio-luminous.
Talk or communication via the medium of radio, especially two-way radio.
A collar incorporating a small radio transmitter, which is fitted to an animal to track its movements in the wild.
To fit (an animal) with a radio collar.
A radio direction-finder used for the purpose of navigation.
The state of being in communication by radio; an instance of this.