V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

TTY
       TeleTYpe


The Jargon File (version 4.4.7, 29 Dec 2003):

tty
 /T?T?Y/, /tit'ee/, n.

    The latter pronunciation was primarily ITS, but some Unix people say it
    this way as well; this pronunciation is not considered to have sexual
    undertones.

    1. A terminal of the teletype variety, characterized by a noisy mechanical
    printer, a very limited character set, and poor print quality. Usage:
    antiquated (like the TTYs themselves). See also bit-paired keyboard.

    2. [especially Unix] Any terminal at all; sometimes used to refer to the
    particular terminal controlling a given job.

    3. [Unix] Any serial port, whether or not the device connected to it is a
    terminal; so called because under Unix such devices have names of the form
    tty*. Ambiguity between senses 2 and 3 is common but seldom bothersome.


The Free On-line Dictionary of Computing (30 December 2018):

tty

    /tit'ee/ (ITS pronunciation, but some Unix
   people say it this way as well; this pronunciation is not
   considered to have sexual undertones), /T T Y/

   1. teletypewriter.

   2. (Especially Unix) Any terminal at all; sometimes used to
   refer to the particular terminal controlling a given job (it
   is also the name of a Unix command which outputs the name of
   the current controlling terminal).

   3. (Unix) Any serial port, whether or not the device
   connected to it is a terminal; so called because under Unix
   such devices have names of the form tty*.  Ambiguity between
   senses 2 and 3 is common but seldom bothersome.

   4. A TDD.

   [Jargon File]

   (1995-11-23)