Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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Nov
28
2014

catalyst

kae tə lihst

noun
definition 1:  a substance that produces or speeds up a chemical reaction without being affected itself.
example:  An enzyme is an organic catalyst.

definition 2:  an agent that causes an interaction between persons or forces without being affected itself.
example:  The incidents of police brutality were the catalyst for the riot.

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