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English definition of “catalyst”

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catalyst

noun [C]
 
 
/ˈkætəlɪst/
someone or something that causes change: Recent riots and suicides have acted as a catalyst for change in the prison system.Causing things to happen
a substance that makes a chemical reaction happen more quicklyChemistry - general words
(Definition of catalyst from the Cambridge Learners Dictionary © Cambridge University Press)
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