Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Greek
Origin: katalysis, from katalyein 'to become liquid', from kata- ( CATACLYSM) + lyein 'to let go, become liquid'

catalysis

 noun
     
ca‧tal‧y‧sis [uncountable] technical
the process of making a chemical reaction quicker by adding a catalyst
Definition from the Longman Dictionary of Contemporary English
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