n. A message, like a telegram, transmitted by radio rather than wires.
n. An entertainment device that combined a radio and a record player or gramophone.
n. A radiograph.
The Century Dictionary and Cyclopedia
n. A picture taken by means of the action of Röntgen rays, or of similar obscure rays such as those emitted by radium, upon a sensitized plate; a print from a radiographic negative.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)
n. a message transmitted by wireless telegraphy
Word Usage
"The formal definition of a radiogram is a plain text message sent in a recognizable format over amateur radio, but in this case it describes a coded message transmitted over shortwave radio directly to operatives in Moscow."