radio-

a combining form with the meanings “dealing with radiant energy” (radiometer), “employing or dealing with radio waves” (radioacoustics; radiolocation; radiotelephone), “emitting rays as a result of the breakup of atomic nuclei” (radioactive; radiocarbon), “characterized by, employing or dealing with such rays” (radiography; radiopaque; radiotherapy).

Nearby words

radio tube, radio valve, radio wave, radio waves, radio window, radio-, radio-carbon, radio-collar, radio-controlled, radio-telephone, radioacoustics

Origin of radio-

< French, combining form representing Latin radius beam, ray, radius

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for radio-

radio-

combining form

denoting radio, broadcasting, or radio frequencyradiogram

indicating radioactivity or radiationradiochemistry; radiolucent

indicating a radioactive isotope or substanceradioactinium; radiothorium; radioelement

Word Origin for radio-

from French, from Latin radius ray; see radius

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for radio-

radio-

word-forming element meaning 1. "ray, ray-like" (see radius); 2. "radial, radially" (see radial (adj.)); 3. "by means of radiant energy" (see radiate (v.)); 4. "radioactive" (see radioactive); 5. "by radio" (see radio (n.)).

Medicine definitions for radio-

radio-

pref.

Radiation; radiant energy:radiometer.

Radioactive:radiochemistry.

Radius:radiobicipital.

radio-

RELATED CONTENT

Nearby words

Origin of radio-

British Dictionary definitions for radio-

radio-

combining form

Word Origin for radio-

Word Origin and History for radio-

radio-

Medicine definitions for radio-

radio-

pref.