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pyrobitumen

[pahy-roh-bi-too-muh n, -tyoo-, -bich-oo-] /ˌpaɪ roʊ bɪˈtu mən, -ˈtyu-, -ˈbɪtʃ ʊ-/
noun
1.
any of the dark, solid hydrocarbons including peat, coal, and bituminous shale.
Origin
1900-1905
1900-05; pyro- + bitumen
Related forms
pyrobituminous, pyrobituminoid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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