Source : Webster's Revised Unabridged Dictionary (1913)

Presser \Press"er\, n.
   One who, or that which, presses.

   {Presser bar}, or {Presser wheel} (Knitting machine), a bar
      or wheel which closes the barbs of the needles to enable
      the loops of the yarn to pass over them.

   {Presser foot}, the part of a sewing machine which rests on
      the cloth and presses it down upon the table of the
      machine.