a brand of synthetic rubber prepared by polymerization of butylene containing little butadiene, particularly useful for inner tubes of automobile tires because of its leakproof qualities.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for butyl
Historical Examples of butyl
The stuff smelled like a mixture of spirits of ammonia and butyl mercaptan, but it did the job.
There are also higher alcohols, that is, those having more complex chemical formulas, such as butyl alcohol.
"And butyl mercaptan; I'm quite aware of that," said the Doctor quickly, to continue the tradition of omniscience.
It has the characteristic odour of the flowers, and consists of a mixture of butyl and amyl angelates and valerates.
British Dictionary definitions for butyl
(modifier) of, consisting of, or containing any of four isomeric forms of the group C 4 H 9 –butyl rubber
Word Origin for butyl
C19: from but (yric acid) + -yl
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
Word Origin and History for butyl
hydrocarbon radical, 1868, from butyric acid, a product of fermentation found in rancid butter, from Latin butyrum "butter" (see butter (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
A hydrocarbon radical, C4H9.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
The radical C4H9, derived from butane.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.