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third-person singular simple present vulcanizes, present participle vulcanizing, simple past and past participle vulcanized
(transitive) To treat rubber with heat and (usually) sulphur to harden it and make it more durable. examples
(intransitive) To undergo such treatment. quotations examples
These vulcanized hearts, they only become more resistant when you ask for mercy.
1976 September, Saul Bellow, Humboldt’s Gift, New York, N.Y.: Avon Books, page 404
Natural rubber […] vulcanizes readily at the double bonds to give a strong cross-linked structure.
2012, Theodore Rochow, Resinography