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 (pĭk′ə-lēn′, pī′kə-)
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.

[Latin pix, pic-, pitch + -ol + -ine.]
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.


(ˈpɪkəˌliːn; -lɪn)
(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]
picolinic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpɪk əˌlin, -lɪn)

any of three liquid isomers of pyridine having the formula C6H7N, obtained from coal tar and used as a solvent.
[1850–55; < Latin pic- (s. of pix) pitch2 + -ol2 + -ine2]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
The adducts of rhodium acetate, containing a nitrogen donor ligand as pyridine, picoline, and aniline derivatives, were reported earlier [23, 66, 67].
Alpha picoline finds wide application as a solvent in chemicals, pharmaceuticals, and food industries.
Deputy Fire Chief Randy DeWitt said the employee sustained minor injuries caused by an exploding beaker in which two nontoxic chemicals - methyl iodide and picoline - were mixed.
Jubilant is also the largest producer of Beta Picoline globally, a raw material used in the manufacture of Vitamin B3.
The PicoLine is available for size reduction/micronization, classification and mixing.
Together, these projects provided a 35% increase in capacity for beta picoline, a key raw material input used to produce 3-cyanopyridine and vitamin B3."