isobutylene

[ ahy-suh-byoot-l-een ]
/ ˌaɪ səˈbyut lˌin /

noun Chemistry.

a colorless, very volatile liquid or flammable gas, C4H8, used chiefly in the manufacture of butyl rubber.

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Also i·so·bu·tene [ahy-suh-byoo-teen] /ˌaɪ səˈbyu tin/.

Origin of isobutylene

First recorded in 1870–75; iso- + butylene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020