A weakly basic sweet-smelling liquid compound present in bone oil and coal tar.
- ‘The Netropsin ligand consists of a guanidinium, two pyrrole, and a propylamidinium part.’
- ‘This step is followed by polymerising pyrrole vapours to produce a foam composite.’
- ‘This would make this particular pyrrole group unequivalent with the others.’
- ‘The free-base form of such porphyrins contains two pyrrole nitrogens.’
Mid 19th century: from Greek purrhos reddish + Latin oleum oil.