Defn: Volcanism.

VULCANIST
Vul"can*ist, n.

Defn: A volcanist.

VULCANITE
Vul"can*ite, n.

Defn: Hard rubber produced by vulcanizing with a large proportion of sulphur.

VULCANIZATION
Vul`can*i*za"tion, n. Etym: [See Vulcan.]

Defn: The act or process of imparting to caoutchouc, gutta-percha, or the like, greater elasticity, durability, or hardness by heating with sulphur under pressure.

VULCANIZE
Vul"can*ize, v. t. [imp. & p. p. Vulcanized; p. pr. & vb. n.
Vulcanizing.]

Defn: To change the properties of, as caoutchouc, or India rubber, by the process of vulcanization. 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.

VULCANIZER
Vul"can*i`zer, n.