Source : Webster's Revised Unabridged Dictionary (1913)

Planing \Plan"ing\,
   a. & vb. n. fr. {Plane}, v. t.

   {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.

Source : WordNet®

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