teletypewriter

n. (Abbr. TTY or TT)
An electromechanical typewriter that either transmits or receives messages coded in electrical signals carried by telegraph or telephone wires.

A low-speed teleprinter, often abbreviated "TTY."

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Unit with keyboard, printer, and paper tape that receives written messages and records information onto storage medium. Information can be sent over telephone lines to a teletypewriter in another location.

Electric typewriter that like a teleprinter can produce coded signals corresponding to the keys pressed or print characters corresponding to the coded signals received.

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The noun has one meaning:

Meaning #1: a character printer connected to a telegraph that operates like a typewriter
  Synonyms: teleprinter, teletype machine, telex, telex machine

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