pyrrole Syllabification: (pyr·role)Pronunciation: /ˈpirˌōl/Definition of pyrrole noun Chemistry a weakly basic sweet-smelling liquid compound present in bone oil and coal tar. A heteroaromatic compound; chemical formula: C4H4NH Origin: mid 19th century: from Greek purrhos 'reddish' + Latin oleum 'oil'pyrrole in other Oxford dictionaries Definition of pyrrole in the British & World English dictionary
