• synonyms


[pi-roh-li-deen, -din, -rol-i-]
noun Chemistry.
  1. 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.
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Origin of pyrrolidine

First recorded in 1880–85; pyrrole + -id3 + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pyrrolidine


  1. an almost colourless liquid occurring in tobacco leaves and made commercially by hydrogenating pyrrole. It is a strongly alkaline heterocyclic base with molecules that contain a ring of four carbon atoms and one nitrogen atom. Formula: C 4 H 9 N
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

pyrrolidine in Medicine


  1. A nearly colorless liquid pyrrole to which four hydrogen atoms have been added. It has an ammonialike odor and is the structural basis of proline and hydroxyproline.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.