Anticatalyst Definition

ăntē-kătl-ĭst, ăntī-
noun
A substance that retards or arrests a chemical reaction.
American Heritage
A substance that slows down a chemical reaction by acting directly on the catalyst.
Webster's New World
A substance that reduces or destroys the effectiveness of a catalyst.
American Heritage

Any substance that inhibits the activity of a catalyst.

Wiktionary
Antonyms:

Other Word Forms of Anticatalyst

Noun

Singular:
anticatalyst
Plural:
anticatalysts

Origin of Anticatalyst

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anticatalyst