CORRUGATED
corrugated
(adjective) shaped into alternating parallel grooves and ridges; “the surface of the ocean was rippled and corrugated”
Source: WordNet® 3.1
Verb
corrugated
simple past tense and past participle of corrugate
Adjective
corrugated (not comparable)
Marked with parallel folds, ridges or furrows.
Bent into regular curved folds or grooves.
Source: Wiktionary
CORRUGATE
Cor"ru*gate (kr"r-gt), a. Etym: [L. corrugatus, p. p. of corrugare;
cor-+ rugare to wrinkle, ruga wrinkle; of uncertain origin.]
Definition: Wrinkled; crumpled; furrowed; contracted into ridges and
furrows.
Cor"ru*gate (-gt), v. t. [imp. & p.p. Corrugated (-g`td); p. pr. &
vb. n. Corrugating (-g`tng).]
Definition: 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. 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.
Source: Webster’s Unabridged Dictionary 1913 Edition