Chemistry. the causing or accelerating of a chemical change by the addition of a catalyst.
2.
an action between two or more persons or forces, initiated by an agent that itself remains unaffected by the action: social catalyses occasioned by controversial writings.
Origin: 1645–55; < NL < Gk katálȳsis dissolution, equiv. to katalȳ́(ein) to dissolve (kata-cata-+ lȳ́ein to loosen) + -sis-sis
Main Entry: ca·tal·y·sis Pronunciation: k&-'tal-&-s&s Function: noun Inflected Form: pluralca·tal·y·ses/-"sEz/ : a change and especially increase in the rate of a chemical reaction induced by a catalyst