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pyrazolone

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Pyrazolone
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py⋅raz⋅o⋅lone

  [pi-raz-uh-lohn, pahy-]
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–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. 2009.
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Pyrazolone
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Medical Dictionary

Main Entry: py·raz·o·lone
Pronunciation: -"lOn
Function: noun
1 : any of three isomeric carbonyl compoundsC3H4N2O derived from pyrazoline
2 : any of various derivatives of the pyrazolones some of which (as antipyrine) have been used as analgesics andantipyretics
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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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