a. [ L. corrugatus, p. p. of corrugare; cor-+ rugare to wrinkle, ruga wrinkle; of uncertain origin. ] Wrinkled; crumpled; furrowed; contracted into ridges and furrows. [ 1913 Webster ]
v. t. [ imp. & p. p. Corrugated p. pr. & vb. n. Corrugating ] 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. [ 1913 Webster ]
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. [ 1913 Webster ]
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