Pyrrole definitions

pîr'ōl'
A five-membered heterocyclic ring compound, C4 H5 N, having an odor similar to chloroform, that is the parent compound of protoporphyrin.
noun
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Any of a class of organic compounds having a five-member ring composed of four carbon atoms and one nitrogen atom. The pyrrole ring structure is a component of many biologically important compounds, including porphyrins, alkaloids, and certain amino acids.
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Any of various derivatives of this compound.
noun
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A five-membered heterocyclic ring compound, C4 H5 N, having an odor similar to chloroform, that is the parent compound of protoporphyrin.
noun
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The simplest of this class of compounds, in which a single hydrogen atom is attached to each atom in the ring. It has a pleasant odor similar to that of chloroform. Chemical formula: C4H5N.
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A colorless, pungent, slightly basic liquid, C4H5N, found in bile pigments, chlorophyll, and hematin, and obtained from coal tar, bone oil, etc.
noun
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(organic chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, C4H5N.
noun
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Origin of pyrrole

Ger pyrrol < Gr pyrrhos, fiery (< pyr, fire) + -ol, -ole