liquefied petroleum gas

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A mixture of propane and butane with traces of some other gases, which is kept in a liquid state at high pressure in metal bottles, and used as a source of gas for cooking, heating and as a fuel in internal combustion engines in vehicles.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun hydrocarbon gases, usually propane or butane, kept under pressure