[ pi-rohl, pir-ohl ]
/ pɪˈroʊl, ˈpɪr oʊl /
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a colorless, toxic, liquid, five-membered ring compound, C4H5N, that is a component of chlorophyll, hemin, and many other important naturally occurring substances.
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Origin of pyrrole
1825–35; irregular <Greek pyrr(hós) red + -ole2
OTHER WORDS FROM pyrrolepyr·rol·ic [pi-rol-ik, -roh-lik], /pɪˈrɒl ɪk, -ˈroʊ lɪk/, adjective
Words nearby pyrrole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
How to use pyrrole in a sentence
This brings selenophene more akin to pyrrole than thiophene, but the group -NH- in the molecule of pyrrole is an auxochrome.
British Dictionary definitions for pyrrole
/ (ˈpɪrəʊl, pɪˈrəʊl) /
a colourless insoluble toxic liquid having a five-membered ring containing one nitrogen atom, found in many naturally occurring compounds, such as chlorophyll. Formula: C 4 H 5 NAlso called: azole
Derived forms of pyrrolepyrrolic (pɪˈrɒlɪk), adjective
Word Origin for pyrrole
C19: from Greek purrhos red, from pur fire + -ole 1
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
Medical definitions for pyrrole
[ pîr′ōl′ ]
A five-membered heterocyclic ring compound that has an odor similar to chloroform and is the parent compound of hemoglobin, chlorophyll, and many other complex, biologically active substances.imidole
Other words from pyrrolepyr•ro′lic (pĭ-rō′lĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for pyrrole
[ pîr′ōl′ ]
Any of a class of organic compounds having a five-member ring composed of four carbon atoms and one nitrogen atom. The pyrrole ring structure is a component of many biologically important compounds, including porphyrins, alkaloids, and certain amino acids.
The simplest of this class of compounds, in which a single hydrogen atom is attached to each atom in the ring. It has a pleasant odor similar to that of chloroform. Chemical formula: C4H5N.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.