WordNet (r) 3.0 (2006):

line printer
    n 1: printer that serves as an output device on a computer;
         prints a whole line of characters at a time [syn: line
         printer, line-at-a-time printer]

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

line printer

    A printer that prints one entire line at a time.
   Print quality is low compared with a laser printer.  Line
   printers typically use sprocket feed and wide fanfold paper.

   Line printer speed is usually measured in lines per minute
   (lpm).  1200 lpm is a good rate for a line printer like a 3205
   m5.  66 lines per page is typical, giving 18 pages per minute
   (ppm).  This assumes all upper case, if a mixed case print
   train is used, throughput is halved.  By comparison, a fast
   laser printer can output 100+ ppm

   (1999-01-13)