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pyrazoline

[pi-raz-uh-leen, -lin, pahy-] /pɪˈræz əˌlin, -lɪn, paɪ-/
noun, Chemistry
1.
any of the group of heterocyclic compounds containing three carbon atoms, two adjacent nitrogen atoms, and one double bond in the ring.
2.
the parent compound, C 3 H 6 N 2 .
Origin
1885-1890
1885-90; pyrazole + -ine2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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