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radio car
radio cassette
radio compass
radio-controlled
radio frequency
radio galaxy
radio interferometer
radio jet
radio source
radio spectrum
radio star
radio telescope
radio wave
radioactive
radioactive dating
radioactive decay
radioactive series
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radio source
ra·di·o source (plural ra·di·o sources)


noun 
Definition:
 
astronomical object producing radio waves: an astronomical object naturally producing radio emissions. Quasars are an example.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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