radiotelegraph

1. Americans can communicate quickly with people in other countries by cable, radiotelegraph radiotelephone.
   美国人可以利用海底电报、无线电报、用户电报及无线电话和他国人民通讯，迅速便捷。
2. The full text is divided into five parts: the introduction is about the basic research and technical background before the appearance of radiotelegraph.
   全文分为五部分：绪论部分简单介绍无线电报出现之前的基础研究及技术实践的背景。

noun

1. the use of radio to send telegraphic messages (usually by Morse code)

   Synonym:    radiotelegraphywireless telegraphwireless telegraphy

2. telegraphy that uses transmission by radio rather than by wire

   Synonym:    radiotelegraphywireless telegraphy