American Heritage Dictionary
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Century Dictionary
(1)
GNU Webster's 1913
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WordNet
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Elsewhere on the web
He's found a way -- he's found a catalyst, and he's found a way to take CO2 and make it into polycarbonates.— Janine Benyus shares nature's designs
The catalyst, which is easy and cheap to make, could be used to generate vast amounts of hydrogen using sunlight to power the reactions.— Qwaider Planet
The reverse process is the basis of a fuel cell, where hydrogen and oxygen react with one another on a surface of something called a catalyst, a chemical which facilitates the chemical reaction.— The British National Party
Fittingly, the catalyst was the murder of a white woman at the hands of a Hispanic male. limiting her contact with others, growing intensely suspicious of her motives.— VDARE.com - Latest Articles
Also noted in my March 12 article, what set the stage for the catalyst was the fact that "... the markets were primed for any good news," with the catalyst being the positive Pandit's Amortization Trial Balloon: Can It Float US Out of Crisis?— Minyanville

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