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

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-)