Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

catalysis

play
noun, ca·tal·y·sis \kə-ˈta-lə-səs\

Definition of catalysis

plural catalysesplay \-ˌsēz\

  1. :  a modification and especially increase in the rate of a chemical reaction induced by material unchanged chemically at the end of the reaction



Origin of catalysis

Greek katalysis dissolution, from katalyein to dissolve, from kata- + lyein to dissolve, release — more at lose


First Known Use: 1836

Rhymes with catalysis


Medical Dictionary

catalysis

play
noun ca·tal·y·sis \kə-ˈtal-ə-səs\

Medical Definition of catalysis

plural catalyses \-ˌsēz\play

  1. :  a change and especially increase in the rate of a chemical reaction induced by a catalyst




Learn More about catalysis


Seen and Heard

What made you want to look up catalysis? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a timid, meek, or unassertive person

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

reduce disapprove perplex soothe
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ