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bituminous coal

noun
1.
a mineral coal that contains volatile hydrocarbons and tarry matter and burns with a yellow, smoky flame; soft coal.
Origin of bituminous coal
1875-1880
First recorded in 1875-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for bituminous coal

bituminous coal

noun
1.
a soft black coal, rich in volatile hydrocarbons, that burns with a smoky yellow flame. Fixed carbon content: 46–86 per cent; calorific value: 1.93 × 107 – 3.63 × 107 J/kg Also called soft coal
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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bituminous coal in Science
bituminous coal
  (bĭ-t'mə-nəs)   
A soft type of coal that burns with a smoky, yellow flame. Bituminous coal is the most abundant form of coal. It has a high sulfur content, and when burned, gives off sulfurous compounds that contribute to air pollution and acid rain. Compare anthracite, lignite.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Word Value for bituminous

14
19
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