catalysis

noun

ca·​tal·​y·​sis kə-ˈta-lə-səs How to pronounce catalysis (audio)
plural catalyses kə-ˈta-lə-ˌsēz How to pronounce catalysis (audio)
: a modification and especially increase in the rate of a chemical reaction induced by material unchanged chemically at the end of the reaction

Example Sentences

Recent Examples on the Web Traditional catalysis has relied on the use of metals and enzymes. Michael T. Nietzel, Forbes, 7 Oct. 2021 List and MacMillan, working independently, developed a new kind of catalysis, called organocatalysis, which uses small, organic molecules that allows the process to be cheaper and better for the environment than the traditional methods. Michael T. Nietzel, Forbes, 7 Oct. 2021 The Nobel panel said List and MacMillan in 2000 independently developed a new way of catalysis. BostonGlobe.com, 6 Oct. 2021 In a new evaluation run by the U.S. Department of Energy's Idaho National Laboratory, NuScale’s nuclear module performed effective catalysis for hydrogen. Caroline Delbert, Popular Mechanics, 14 Dec. 2020 At the surface Where the SrTiO3 tends to fall short is in the catalysis. John Timmer, Ars Technica, 27 May 2020 That crystalline structure imparts mechanical properties that are useful for catalysis, gas storage, and drug delivery, for example. Jennifer Ouellette, Ars Technica, 21 July 2019 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'catalysis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

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

First Known Use

1836, in the meaning defined above

Time Traveler
The first known use of catalysis was in 1836

Dictionary Entries Near catalysis

Cite this Entry

“Catalysis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/catalysis. Accessed 3 Feb. 2023.

Kids Definition

catalysis

noun
ca·​tal·​y·​sis kə-ˈtal-ə-səs How to pronounce catalysis (audio)
: the change and especially increase in the rate of a chemical reaction caused by a catalyst

Medical Definition

catalysis

noun
ca·​tal·​y·​sis kə-ˈtal-ə-səs How to pronounce catalysis (audio)
plural catalyses -ˌsēz How to pronounce catalysis (audio)
: a change and especially increase in the rate of a chemical reaction induced by a catalyst

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