pyrrole

[ pi-rohl, pir-ohl ]

/ pɪˈroʊl, ˈpɪr oʊl /

noun Chemistry.

a colorless, toxic, liquid, five-membered ring compound, C4H5N, that is a component of chlorophyll, hemin, and many other important naturally occurring substances.

Origin of pyrrole

1825–35; irregular <Greek pyrr(hós) red + -ole²

OTHER WORDS FROM pyrrole

pyr·rol·ic

[pi-rol-ik, -roh-lik], /pɪˈrɒl ɪk, -ˈroʊ lɪk/, adjective

Words nearby pyrrole

Pyrrho, Pyrrhonism, pyrrhotite, pyrrhuloxia, Pyrrhus, pyrrole, pyrrolidine, Pyrrophyta, pyrrophyte, pyruvate, pyruvate kinase deficiency

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for pyrrole

This brings selenophene more akin to pyrrole than thiophene, but the group -NH- in the molecule of pyrrole is an auxochrome.
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives|Y-Gwan Chen

British Dictionary definitions for pyrrole

pyrrole

/ (ˈpɪrəʊl, pɪˈrəʊl) /

noun

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 pyrrole

pyrrolic (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

pyrrole

[ pîr′ōl′ ]

n.

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 pyrrole

pyr•ro′lic (pĭ-rō′lĭk) adj.

Scientific definitions for pyrrole

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.

单词	pyrrole
释义	pyrrole [ pi-rohl, pir-ohl ] / pɪˈroʊl, ˈpɪr oʊl / noun Chemistry. a colorless, toxic, liquid, five-membered ring compound, C4H5N, that is a component of chlorophyll, hemin, and many other important naturally occurring substances. Origin of pyrrole 1825–35; irregular <Greek pyrr(hós) red + -ole² OTHER WORDS FROM pyrrole pyr·rol·ic [pi-rol-ik, -roh-lik], /pɪˈrɒl ɪk, -ˈroʊ lɪk/, adjective Words nearby pyrrole Pyrrho, Pyrrhonism, pyrrhotite, pyrrhuloxia, Pyrrhus, pyrrole, pyrrolidine, Pyrrophyta, pyrrophyte, pyruvate, pyruvate kinase deficiency Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for pyrrole This brings selenophene more akin to pyrrole than thiophene, but the group -NH- in the molecule of pyrrole is an auxochrome. Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives\|Y-Gwan Chen British Dictionary definitions for pyrrole pyrrole / (ˈpɪrəʊl, pɪˈrəʊl) / noun 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 pyrrole pyrrolic (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 pyrrole [ pîr′ōl′ ] n. 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 pyrrole pyr•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 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.
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