pyrazole

[ pir-uh-zohl, -zawl ]
/ ˈpɪr əˌzoʊl, -ˌzɔl /

noun Chemistry.

any of the group of heterocyclic compounds containing three carbon atoms, two adjacent nitrogen atoms, and two double bonds in the ring.
the parent compound, C3H4N2.

Origin of pyrazole

First recorded in 1885–90; pyr- + azole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for pyrazole

pyrazole

/ (ˈpaɪrəˌzəʊl) /

noun

a crystalline soluble basic heterocyclic compound; 1,2-diazole. Formula: C 3 H 4 N 2

Word Origin for pyrazole

C19: from German, from pyrrole + inserted -az- (see azo-)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012