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pyrazolone

[pi-raz-uh-lohn, pahy-] /pɪˈræz əˌloʊn, paɪ-/
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, C 3 H 4 N 2 O.
Origin
1885-1890
1885-90; pyrazole + -one
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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pyrazolone in Medicine

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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