TELEGRAPHY
telegraph, telegraphy
(noun) apparatus used to communicate at a distance over a wire (usually in Morse code)
telegraphy
(noun) communicating at a distance by electric transmission over wire
Source: WordNet® 3.1
Etymology
Noun
telegraphy (usually uncountable, plural telegraphies)
communication at a distance by means of the telegraph, either over wires or by wireless telegraphy, usually using Morse code
the apparatus and techniques used in such a system
Source: Wiktionary
Te*leg"ra*phy, n. Etym: [Cf. F. télégraphie.]
Definition: The science or art of constructing, or of communicating by
means of, telegraphs; as, submarine telegraphy.
Source: Webster’s Unabridged Dictionary 1913 Edition