Corrugate /(k?r"r?-g?t)/

Cor·ru·gate

Corrugate

a.
  1. Wrinkled; crumpled; furrowed; contracted into ridges and furrows.

Corrugate

v. t.

imp. & p. p. Corrugated; p. pr. & vb. n. Corrugating

  1. To form or shape into wrinkles or folds, or alternate ridges and grooves, as by drawing, contraction, pressure, bending, or otherwise; to wrinkle; to purse up; as, to corrugate plates of iron; to corrugate the forehead.

Phrases & Compounds
Corrugated iron
sheet iron bent into a series of alternate ridges and grooves in parallel lines, giving it greater stiffness.
Corrugated paper
a thick, coarse paper corrugated in order to give it elasticity. It is used as a wrapping material for fragile articles, as bottles.