Pronunciation: (ku-tal'u-sis), [key]
—pl. -sesPronunciation: (-sēz"). [key]
1. Chem.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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.