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coal tar

noun
1.
a thick, black, viscid liquid formed during the distillation of coal, that upon further distillation yields compounds, as benzene, anthracene, and phenol, from which are derived a large number of dyes, drugs, and other synthetic compounds, and that yields a final residuum (coal-tar pitch) which is used chiefly in making pavements.
Origin
1775-1785
1775-85
Related forms
coal-tar, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for coal-tar pitch

coal-tar pitch

noun
1.
a residue left by the distillation of coal tar: a mixture of hydrocarbons and finely divided carbon used as a binder for fuel briquettes, road surfaces, and carbon electrodes

coal tar

noun
1.
a black tar, produced by the distillation of bituminous coal, that can be further distilled to yield benzene, toluene, xylene, anthracene, phenol, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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coal-tar pitch in Medicine

coal tar n.
A viscous black liquid containing numerous organic compounds that is obtained by the destructive distillation of coal and that has many uses including as raw material for many dyes, drugs, and paints.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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coal-tar pitch in Science
coal tar  
A thick, sticky, black liquid obtained through the destructive distillation (heating in the absence of air) of coal. It is used as a source of many organic compounds, such as benzene, naphthalene, and phenols, which are used in dyes, drugs, and other compounds.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for coal-tar pitch

coal tar

principal liquid product resulting from the carbonization of coal, i.e., the heating of coal in the absence of air, at temperatures ranging from about 900 to 1,200 C (1,650 to 2,200 F). Many commercially important compounds are derived from coal tar.

Learn more about coal tar with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Word Value for coal

6
8
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