Definition
In the manner of radiotelegraphy; referring to communication using radio waves to transmit telegraph signals (Morse code or similar encoded messages) without physical wiring.
Example Usage
The ships communicated radiotelegraphically during the naval exercise.
Origin
radio- (Latin: radius, ray) + telegraphy (tele-, distant + graphia, writing) + -ically (adverbial suffix)
Fun Fact
Radiotelegraphy was the dominant long-distance communication method for ships and military operations in the early-to-mid 20th century before radio telephony became standard.
Source: Definition backfill (hailey)
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