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From The Collaborative International Dictionary of English v.0.48:
Vulcanize \Vul"can*ize\, v. t. [imp. & p. p. Vulcanized; p. pr. & vb. n. Vulcanizing.] To change the properties of, as caoutchouc, or India rubber, by the process of vulcanization. [1913 Webster] Vulcanized fiber, paper, paper pulp, or other fiber, chemically treated, as with metallic chlorides, so as to form a substance resembling ebonite in texture, hardness, etc. --Knight. Vulcanized rubber, India rubber, vulcanized. [1913 Webster]