isobutane

[ahy-suh-byoo-teyn, -byoo-teyn]

noun Chemistry.

a colorless, flammable gas, C4H10, used as a fuel, as a refrigerant, and in the manufacture of gasoline by alkylation.

Origin of isobutane

First recorded in 1875–80; iso- + butane
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019