ra·dio·tele·graph /-ˈtɛləˌgræf/
  無線電報
  Ra·di·o·tel·e·graph n.   A wireless telegraph.
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  radiotelegraph
       n 1: telegraphy that uses transmission by radio rather than by
            wire [syn: radiotelegraphy, wireless telegraphy]
       2: the use of radio to send telegraphic messages (usually by
          Morse code) [syn: radiotelegraphy, wireless telegraph,
           wireless telegraphy]