Dictionary  pyr•rol•i•dinePronunciation: (pi-rō'li-dēn", -din, -rol'i-), [key] —n. Chem. a colorless, water-soluble, unpleasant smelling, poisonous liquid, C4H9N, from which proline and certain alkaloids are derived, prepared by reducing pyrrole: used chiefly in organic synthesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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