Dictionary
catalyst
noun cat·a·lyst \ˈka-tə-ləst\
: a substance that causes a chemical reaction to happen more quickly
: a person or event that quickly causes change or action
Full Definition of CATALYST
1
: a substance that enables a chemical reaction to proceed at a usually faster rate or under different conditions (as at a lower temperature) than otherwise possible
2
: an agent that provokes or speeds significant change or action
See catalyst defined for English-language learners
See catalyst defined for kids
ADVERTISEMENT
First Known Use of CATALYST
1902
Medical Dictionary
catalyst
noun cat·a·lyst \ˈkat-əl-əst\
Medical Definition of CATALYST
: a substance (as an enzyme) that enables a chemical reaction to proceed under different conditions (as at a lower temperature) than otherwise possible
Learn More About CATALYST
Browse
ADVERTISEMENT
Seen & Heard
What made you want to look up catalyst? Please tell us where you read or heard it (including the quote, if possible).