pyrazole

American  

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

noun

Chemistry.

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

2. the parent compound, C 3 H 4 N 2 .

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pyrazole British  

/ ˈpaɪrəˌzəʊl /

noun

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

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Etymology

Origin of pyrazole

First recorded in 1885–90; pyr- + azole

Example Sentences

Pyrrol yields an analogous series: pyrazole, imidazole or glyoxaline, azimide or osotriazole, triazole and tetrazole: Six-membered ring systems can be referred back, in a manner similar to the above, to pyrone, penthiophene and pyridine, the substances containing a ring of five carbon atoms, and an oxygen, sulphur and nitrogen atom respectively.

From Project Gutenberg