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| cat·a·lyst [ kátt'list ] (plural cat·a·lysts) |
noun |
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| Definition: |
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1. chemical that accelerates chemical reaction: a substance that increases the rate of a chemical reaction without itself undergoing any change
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2. stimulus to change: somebody or something that makes a change happen or brings about an event
 The quarrel acted as a catalyst for the breakup of their partnership.
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| [Early 20th century. <catalysis] |
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