Definition of pyrrole in English:


Syllabification: pyr·role
Pronunciation: /ˈpirˌōl


  • A weakly basic sweet-smelling liquid compound present in bone oil and coal tar.
    • A heteroaromatic compound; chemical formula: C4H4NH
    More example sentences
    • This step is followed by polymerising pyrrole vapours to produce a foam composite.
    • The free-base form of such porphyrins contains two pyrrole nitrogens.
    • The Netropsin ligand consists of a guanidinium, two pyrrole, and a propylamidinium part.


mid 19th century: from Greek purrhos 'reddish' + Latin oleum 'oil'.

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