catalyst KAT-uh-list noun WS #8

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change; a person or thing that precipitates an event or change

1. Platinum is used as a catalyst in many chemical reactions.
2. Her resignation was the catalyst for major reforms in the organization.
3. The teacher was a catalyst for many students to pursue careers in science.
4. The new tax law served as a catalyst for economic growth.
5. The protest became a catalyst for social change in the community.