English dictionary

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English noun: catalyst

1. catalyst (substance) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected


Broader (hypernym)activator

Narrower (hyponym)biocatalyst, enzyme, platinum black

Domain categorychemical science, chemistry


2. catalyst (person) something that causes an important event to happen

SamplesThe invasion acted as a catalyst to unite the country.

Broader (hypernym)causal agency, causal agent, cause

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