Keyboard In The Wilderness schreef:

Very good Brian
Answer is (as best we know)
ORIGIN OF THE WORD RADIO
From "UNITED STATES EARLY RADIO HISTORY" BY THOMAS H. WHITE

Radio, currently a synonym for "electromagnetic radiation", actually first
came into use before Heinrich Hertz's proof of the existence of radio waves.
Originally "radio" was a general prefix meaning "radiant" or "radiation" --

In Spanisch the use of the word "radio" reveils this.
CaRaCol = Cadena Radial Colombiana
Literally: Radiating network in Colombia.
ruud