ˈprōˌpān noun
( -s )
Etymology: International Scientific Vocabulary prop- + -ane
: a flammable gaseous paraffin hydrocarbon CH 3 CH 2 CH 3 that is heavier than air, occurs naturally in crude petroleum and natural gas and is also obtained by cracking, and is used chiefly as a fuel (as in liquefied petroleum gas) and in the manufacture of chemicals (as the lower nitroparaffins)