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Noun: pyrrole  'pi,rówl
  1. (organic chemistry) any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and an nitrogen atom; especially the simplest one, C4H5N

Derived forms: pyrroles

Encyclopedia: Pyrrole

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Pyrrhula pyrrhula
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Pyrrhus of Epirus
pyrrole
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Pythagorean