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Definition of platinum black - 2 dictionary results

platinum black

–noun Chemistry.
a black powder consisting of very finely divided metallic platinum, used as a catalyst, esp. in organic synthesis.

Origin:
1850–55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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platinum black  
n.  A fine black powder of metallic platinum, used as a catalyst and as a gas absorbent.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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