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Relating to or being a hydrocarbon unit, C4H9, that can occur as a substituent in an organic compound or as an ion or radical.
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) (modifier) of, consisting of, or containing any of four isomeric forms of the group C4H9–: butyl rubber.
[C19: from but(yric acid) + -yl]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
bu•tyl(ˈbyu tɪl, ˈbyut l)
any of four univalent isomeric groups with the formula C4H9.
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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|Noun||1.||butyl - a hydrocarbon radical (C4H9)|
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
isobutylene - used also in making gasoline components
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