From The Collaborative International Dictionary of English v.0.48 [gcide]:
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]
From WordNet (r) 3.0 (2006) [wn]:
planing machine
n 1: a power tool for smoothing or shaping wood [syn: plane,
planer, planing machine]