Aucune définition officielle pour le moment...
A communications system that transmits and receives simple unmodulated electric impulses, especially one in which the transmission and reception stations are ...
http://www.thefreedictionary.com/telegraph
télégraphe, définition du mot télégraphe dans le dictionnaire. Définition : Système de transmission de...
http://www.thefreedictionary.com/telegraph
an old-fashioned system of sending messages over long distances by using wires and electrical signals. : a device used for sending or receiving messages by ...
http://www.linternaute.com/dictionnaire/fr/definition/telegraphe/
Contrary to the extensive definition used by Chappe, Morse argued that the term telegraph can strictly be applied only to systems that transmit and record ...
http://www.linternaute.com/dictionnaire/fr/definition/telegraphe/
Definition of telegraph in American English in Oxford dictionary (US). Meaning, pronunciation and example sentences. English to English reference content.
http://www.merriam-webster.com/dictionary/telegraph
A telegraph is a system in which information is communicated over a wire with a series of electrical current pulses, usually in the form of Morse code.
http://www.merriam-webster.com/dictionary/telegraph