Webster’s Revised Unabridged Dictionary · 1913
Corrugation
Cor′ru·ga′tion (k?r′r?-g?′sh?n), n. [Cf. F. corrugation.] The act corrugating; contraction into wrinkles or alternate ridges and grooves.
Webster’s Revised Unabridged Dictionary · 1913
Cor′ru·ga′tion (k?r′r?-g?′sh?n), n. [Cf. F. corrugation.] The act corrugating; contraction into wrinkles or alternate ridges and grooves.