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anticatalyst

[an-tee-kat-l-ist, an-tahy-] /ˌæn tiˈkæt l ɪst, ˌæn taɪ-/
noun, Chemistry
1.
an inhibitor.
Origin
1920-1925
1920-25; anti- + catalyst
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for anti-catalyst

anticatalyst

/ˌæntɪˈkætəlɪst/
noun
1.
a substance that destroys or diminishes the activity of a catalyst
2.
another name for inhibitor (sense 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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