bu·ta·nol (byo?o?t?-nôl?, -n?l?, n?l?)n. Either of two isomeric alcohols, C4H10O, derived from butane and used as solvents and in organic synthesis. Also called butyl alcohol.[butan(e) + -ol.]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.butanol (?bju?t??n?l) n (Elements & Compounds) a colourless substance existing in four isomeric forms. The three liquid isomers are used as solvents for resins, lacquers, etc, and in the manufacture of organic compounds. Formula: C4H9OH. Also called: butyl alcohol [C19: from butan(e) + -ol1]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014bu?tyl al?cohol n. any of four flammable isomeric liquid alcohols having the formula C4H9OH, used as solvents and in organic synthesis. Also called butanol. [1865?70] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.