radio-


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radio-

or radi-
pref.
1. Radiation; radiant energy: radiometer.
2. Radioactive: radiochemistry.
3. Radio: radiotelephone.

[From radiation.]

radio-

combining form
1. (Telecommunications) denoting radio, broadcasting, or radio frequency: radiogram.
2. (General Physics) indicating radioactivity or radiation: radiochemistry; radiolucent.
3. (Nuclear Physics) indicating a radioactive isotope or substance: radioactinium; radiothorium; radioelement.
[from French, from Latin radius ray; see radius]

ra•di•o

(ˈreɪ diˌoʊ)

n., pl. -di•os, n.
1. a system of telecommunication employing electromagnetic waves of a particular frequency range to transmit speech or other sound over long distances without the use of wires.
2. an apparatus for receiving or transmitting radio broadcasts.
3. a message transmitted by radio.
adj.
4. pertaining to, used in, or sent by radio.
5. pertaining to electromagnetic radiation having frequencies in the range of approximately 10 kHz to 300,000 MHz: radio waves.
v.t.
6. to transmit (a message, music, etc.) by radio.
7. to send a message to (a person) by radio.
v.i.
8. to transmit a message, music, etc., by radio.
[1910–15; shortening of radiotelegraph or radiotelegraphy]

radio-

a combining form with the meanings “radiant energy” (radiometer), “radio waves” (radiophotograph ), “emission of rays as a result of the breakup of atomic nuclei” (radioactivity), “x-rays” (radiotherapy).
[< French, comb. form representing Latin radius beam]
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The BIRSt Radio- Bournemouth University United Kingdom got second position in the contest.

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