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bitumen

bi·tu·men [ bi tmən, bi tymən, bī tmən, bī tymən ]


noun 
Definition:
 
road-surfacing material: a sticky mixture of hydrocarbons found in substances such as asphalt and tar. Source: petroleum.

[15th century. < Latin, "asphalt"]

bi·tu·mi·noid adjective
bi·tu·mi·nous adjective
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