pyrazolone

[pi-raz-uh-lohn, pahy-]

py·raz·o·lone

[pi-raz-uh-lohn, pahy-]
noun Chemistry.
1.
any of the group of heterocyclic compounds containing the pyrazoline ring in which one carbon atom is doubly linked to an oxygen atom not in the ring.
2.
the parent compound, C3H4N2O.

Origin:
1885–90; pyrazole + -one
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pyrazolone is always a great word to know.
So is ammonia. Does it mean:
a colorless, pungent, suffocating, highly water-soluble, gaseous compound, NH3, usually produced by the combination of nitrogen and hydrogen gases
rapid oxidation accompanied by heat and light, or a chemical combination attended by production of heat and light
American Heritage
Medical Dictionary

pyrazolone py·raz·o·lone (pĭ-rāz'ə-lōn')
n.
A class of nonsteroidal anti-inflammatory agents, such as phenylbutazone, used in the treatment of arthritis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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