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Any of three isomeric liquids, C6H7N, related to pyridine and derived from coal tar, horse urine, and rendered bones, that are variously used as industrial solvents, waterproofing agents, intermediates in dyes and resins, and in the synthesis of picolinic acid and niacin.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Elements & Compounds) a liquid derivative of pyridine found in bone oil and coal tar; methylpyridene. Formula: C5H4N(CH3)
[C19: from Latin pic-, pix pitch2 + -ol2 + -ine2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
pic•o•line(ˈpɪk əˌlin, -lɪn)
any of three liquid isomers of pyridine having the formula C6H7N, obtained from coal tar and used as a solvent.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.