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pyrrolidine

[ pi-roh-li-deen, -din, -rol-i- ]
/ pɪˈroʊ lɪˌdin, -dɪn, -ˈrɒl ɪ- /
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noun Chemistry.
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. 2023

British Dictionary definitions for pyrrolidine

pyrrolidine
/ (pɪˈrɒlɪˌdiːn) /

noun
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
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
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