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

printer port

    A connector found on many microcomputers
   intended for attaching a printer.  This may be a
   general-purpose input/output parallel port or may be a
   special Centronics interface.

   Most printers can also be connected to a serial port but
   that is unlikely to be described as a "printer port".

   (1996-01-07)