Definition of isobutane
: a gaseous branched-chain hydrocarbon (CH3)3CH isomeric with normal butane that is used especially as a fuel
Origin of isobutane
International Scientific Vocabulary
First Known Use: 1876
Learn More about isobutane
Britannica.com: Encyclopedia article about "isobutane"
Seen and Heard
What made you want to look up isobutane? Please tell us where you read or heard it (including the quote, if possible).