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catalysis

ca·tal·y·sis [ kə tálləssiss ] (plural ca·tal·y·ses [ kə tállə sz ])


noun 
Definition:
 
speeding up of chemical reaction: an increase in the rate of a chemical reaction as a result of the action or use of a catalyst

[Mid-17th century. Via modern Latin, "dissolution" < Greek katalusis< kataluein "dissolve" < luein "set free"]
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