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1. A substance that retards or arrests a chemical reaction.
2. A substance that reduces or destroys the effectiveness of a catalyst.
1. (Chemistry) a substance that destroys or diminishes the activity of a catalyst
2. (Chemistry) another name for inhibitor2
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|Noun||1.||anticatalyst - (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst|
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
inhibitor - a substance that retards or stops an activity