a telegraph in which messages or signals are sent by means of radio waves rather than through wires or cables
transitive verb or intransitive verb
2.
to telegraph by radiotelegraphy
Derived forms
radiotelegraphic
adjective
Word origin
[1905–10; radio- + telegraph]This word is first recorded in the period 1905–10. Other words that entered Englishat around the same time include: airway, aspect ratio, push-up, scrounge, thiamineradio- is 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)