Definition of radio- in English:

radio-

Pronunciation /ˈrādēō/ /ˈreɪdioʊ/

  • 1Denoting radio waves or broadcasting.

    ‘radio-controlled’
    • ‘radiogram’
  • 2Physics
    Connected with rays, radiation, or radioactivity.

    ‘radiogenic’
    • ‘radiograph’
    1. 2.1Denoting artificially prepared radioisotopes of elements.
      • ‘radio-cobalt’
  • 3Anatomy
    Belonging to the radius in conjunction with some other part.

    • ‘radio-carpal’

Origin

Late 19th century from radio or radius.