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Word of the Day Tuesday, June 9, 2026

catalyst

/kætəlɪst/ noun · British & US
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What does catalyst mean?

noun

A substance that causes or accelerates a chemical reaction without being consumed or permanently altered in the process. A person or thing that precipitates an event or change.

Example

"The addition of a catalyst to the reaction mixture greatly increased its rate."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for catalyst

Antonyms of catalyst

Rhymes with catalyst

Etymologically related