telegraphic signal


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Noun1.telegraphic signal - a signal transmitted by telegraphy
signal, signaling, sign - any nonverbal action or gesture that encodes a message; "signals from the boat suddenly stopped"
dit, dot - the shorter of the two telegraphic signals used in Morse code
dah, dash - the longer of the two telegraphic signals used in Morse code
References in classic literature ?
A telegraphic signal, improperly interpreted, owing to the fog, was the cause of this error.
The value of radio waves to communications was originally recognized and exploited in 1895 by Guglielmo Marconi, who first transmitted telegraphic signals over long distances.