pyrrole

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English[edit]

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Etymology[edit]

From German Pyrrol, corresponding to Ancient Greek πυρρός (purrhós, reddish, fiery) +‎ -ole.

Pronunciation[edit]

Noun[edit]

pyrrole (plural pyrroles)

  1. (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. [from 19th c.]
    • 1998, Georgina Ferry, Dorothy Hodgkin: A Life:
      The way the red crystals absorbed light suggested that the molecule might contain a porphyrin-like structure, a flat ring made up of four smaller rings called pyrroles […].

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