Gray History of Wireless Museum at the VOA Museum of Broadcasting
The etymology of radio or radiotelegraphy reveals that it was called wireless telegraphy, which was shortened to wireless in Britain.

The prefix radio- in the sense of wireless transmission, was first recorded in the word radioconductor, a description provided by the French physicist Édouard Branly in 1897.

It is based on the verb to radiate (in Latin radius means spoke of a wheel, beam of light, ray).

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