SINCE 1828
pyrazolone
noun
py·raz·o·lone
| \ -ˌlōn
\
\
Medical Definition of pyrazolone
1
: any of three isomeric carbonyl compounds C3H4N2O derived from pyrazoline
2
: any of various derivatives of the pyrazolones some of which (as antipyrine) have been used as analgesics and antipyretics
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