catalyst
🇺🇸
/ˈkætəlɪst/
🇬🇧
/ˈkætəlɪst/
A substance that helps a chemical reaction to happen more quickly without being used up in the process.
The new catalyst was used to speed up the reaction in the lab.
A person or thing that causes a significant change or action.
The new policy acted as a catalyst for the company's growth.