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TOEFL IELTS BNC: 8852 COCA: 7915

catalyst

1 ENTRIES FOUND:
catalyst /ˈkætələst/ noun
plural catalysts
catalyst
/ˈkætələst/
noun
plural catalysts
Learner's definition of CATALYST
[count]
1 
technical : a substance that causes a chemical reaction to happen more quickly催化剂
2 
: a person or event that quickly causes change or action刺激因素
TOEFL IELTS BNC: 8852 COCA: 7915

catalyst

noun

cat·​a·​lyst ˈka-tə-ləst How to pronounce catalyst (audio)
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
That waterway became the catalyst of the area's industrialization.
He was the catalyst in the native uprising.

Did you know?

Word History of Catalyst

Catalyst is a fairly recent addition to the English language, first appearing at the start of the 20th century with its chemistry meaning. It was formed from the word catalysis, another chemistry term which refers to a modification and especially an increase in the rate of a chemical reaction induced by material unchanged chemically at the end of the reaction. By the 1940s, the figurative sense of catalyst was in use for someone or something that quickly causes change or action.

Example Sentences

The bombing attack was the catalyst for war. She was proud to be a catalyst for reform in the government.
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Word History

Etymology

see catalysis

First Known Use

1902, in the meaning defined at sense 1

Time Traveler
The first known use of catalyst was in 1902

Phrases Containing catalyst
TOEFL IELTS BNC: 8852 COCA: 7915

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