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isobutylene

[ahy-suh-byoot-l-een] /ˌaɪ səˈbyut lˌin/
noun, Chemistry
1.
a colorless, very volatile liquid or flammable gas, C 4 H 8 , used chiefly in the manufacture of butyl rubber.
Also, isobutene
[ahy-suh-byoo-teen] /ˌaɪ səˈbyu tin/ (Show IPA)
.
Origin
1870-1875
1870-75; iso- + butylene
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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