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coal gas

noun
1.
a gas used for illuminating and heating, produced by distilling bituminous coal and consisting chiefly of hydrogen, methane, and carbon monoxide.
2.
the gas formed by burning coal.
Origin of coal gas
1800-1810
1800-10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for coal gas

coal gas

noun
1.
a mixture of gases produced by the distillation of bituminous coal and used for heating and lighting: consists mainly of hydrogen, methane, and carbon monoxide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Value for coal

6
8
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