The Collaborative International Dictionary of English v.0.48:

Planing \Plan"ing\,
   a. & vb. n. fr. Plane, v. t.
   [1913 Webster]

   Planing machine.
   (a) See Planer.
   (b) A complex machine for planing wood, especially boards,
       containing usually a rapidly revolving cutter, which
       chips off the surface in small shavings as the piece to
       be planed is passed under it by feeding apparatus.
       [1913 Webster]

WordNet (r) 3.0 (2006):

planing machine
    n 1: a power tool for smoothing or shaping wood [syn: plane,
         planer, planing machine]