Planes

Plane , v. i. Of a boat, to lift more or less out of the water while in motion, after the manner of a hydroplane; to hydroplane.
Plane , v. t. [imp. & p. p. Planed (?); p. pr. & vb. n. Planing.]
[Cf. F. planer, L. planare, fr. planus. See Plane, a., Plain, a., and cf. Planish.] 1. To make smooth; to level; to pare off the inequalities of the surface of, as of a board or other piece of wood, by the use of a plane; as, to plane a plank.
Category:Math dictionary