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Use "catalyzer" in a sentence
"DEFINITION: _A catalyzer is a substance which changes the velocity of a reaction, but does not change its products."
"Analogy: Replacing the catalyzer in an 03-K64 Firefly."
"Also, Fillion revealed on Twitter that he swiped the catalyzer from 'Out of Gas' and put it in Castle's living room bookshelf beneath the model boat."