bu ‧ tane /ˈbjuːteɪn/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Origin: butyl type of chemical group (19-21 centuries) (from Latin butyrum ( ⇨ ↑ butter 1 ); because it smells of butter that is no longer fresh) + -ane 'carbon chemical compound' ]
a gas stored in liquid form, used for cooking and heating