1. Noun.  (chemistry) Any substance that can bond, mix, or disturb another substance and cause an increase in the speed of a natural or artificial chemical process.
  2. Noun.  A substance that accelerates the development of a fire; especially some petroleum product used to spread an act of arson.
  3. Noun.  A substance used to catalyze the vulcanization of rubber.

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This entry was last updated on RefTopia from its source on 3/20/2012.