[byoo-teyn, byoo-teyn]
noun Chemistry.
a colorless, flammable gas, C 4 H 10 , a saturated aliphatic existing in two isometric forms: used chiefly in the manufacture of rubber and as fuel.

1870–75; but(yl) + -ane

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World English Dictionary
butane (ˈbjuːteɪn, bjuːˈteɪn)
a colourless flammable gaseous alkane that exists in two isomeric forms, both of which occur in natural gas. The stable isomer, n-butane, is used mainly in the manufacture of rubber and fuels (such as Calor Gas). Formula: C4H10
[C19: from but(yl) + -ane]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1875, from but(yl), hydrocarbon from butyric acid, a product of fermentation found in rancid butter, from L. butyrum (see butter) + chemical suffix -ane.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

butane bu·tane (byōō'tān')
Either of two isomers of a gaseous hydrocarbon produced synthetically from petroleum and used as a refrigerant, and aerosol propellant and in the manufacture of synthetic rubber.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
butane   (by'tān')  Pronunciation Key 
An organic compound found in natural gas and produced from petroleum. Butane is used as a household fuel, refrigerant, and propellant in aerosol cans. It is the fourth member of the alkane series. Chemical formula: C4H10.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


either of two colourless, odourless, gaseous hydrocarbons (compounds of carbon and hydrogen), members of the series of paraffinic hydrocarbons. Their chemical formula is C4H10. The compound in which the carbon atoms are linked in a straight chain is denoted normal butane, or n-butane; the branched-chain form is isobutane. Both compounds occur in natural gas and in crude oil and are formed in large quantities in the refining of petroleum to produce gasoline.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Powered by propane or a mixture of propane and butane, these devices are not
  meant to burn weeds.
Natural gas is primarily composed of methane, but contains ethane, propane and
  butane as well.
Lute is already moving about the tent, melting snow on two butane stoves for
  some hot soup.
At its heart, though, it's little more than a copper pipe containing a butane
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