An alarm clock that includes a radio; a radio alarm clock

(physics) The energy transmitted by radio-frequency electromagnetic radiation

(chemistry) The strong base Ra(OH)₂ obtained when radium reacts with water; it has no commercial use

Any of a line of preset buttons on a car radio used to select the station to be listened to; pressing one releases the others

(astronomy) All the electromagnetic radiation entering the Earth from non-point sources in deep space.

(physics) electromagnetic radiation that has a frequency of about 3 to 30 GHz

A broadcast station from which radio programs are transmitted.

A therapist who specialises in radiotherapy

plural of radio telescope

plural of radio station