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 catalyst catalyst

noun

  • something that causes an important event to happen  ( catalyst )
    something that causes an important event to happen
     the invasion acted as a catalyst to unite the country
    the invasion acted as a catalyst to unite the country
  • (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected  ( accelerator, catalyst )
    (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected


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