radio
RAY-dee-oh
/ˈreɪdiˌoʊ/
The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages; a device used for this purpose.
Can refer to the technology, the medium, or the device itself. Often evokes a sense of auditory communication.
The story behind the word. The word 'radio' comes from the Latin 'radius,' meaning 'ray' or 'spoke of a wheel.' This root was chosen because early experiments with electromagnetic waves involved 'radiating' energy outwards. The term 'radiotelegraphy' was shortened to 'radio' in the early 20th century to describe the new wireless communication technology.
Word relationships
- wireless: An older, somewhat archaic term for radio, emphasizing the lack of wires.
Commonly confused with
- television: Radio transmits sound only, while television transmits both sound and moving images.
Word family
- radiate (verb): To emit energy, especially in the form of rays or waves.
- radiology (noun): The science dealing with X-rays and other high-energy radiation.
Collocations
- radio station
- radio waves
- radio broadcast
- on the radio
Idioms & expressions
- radio silence
- radio in
Example sentences
- "My grandfather still listens to the news on his old transistor radio every morning." Referring to the device.
- "Despite the rise of television and the internet, radio remains a powerful medium for local news and music." Referring to the medium.
Memory hook
Think of 'rays' of sound traveling through the air. Rays of Sound
When not to use
While 'radio' can be a verb ('to radio for help'), avoid using it as a general verb for 'to communicate' if other, more precise terms like 'call' or 'message' are more appropriate.
Fun facts
- The first commercial radio broadcast in the U.S. was KDKA in Pittsburgh in 1920.
- The term 'radio' was popularized by Guglielmo Marconi, often credited with inventing radio technology.
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