telegraphic signal

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Noun1.telegraphic signal - a signal transmitted by telegraphy
radiotelegraphic signal
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in classic literature
A telegraphic signal, improperly interpreted, owing to the fog, was the cause of this error."
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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.
On the air: radio astronomy has a very large array of champions
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