Bitumen

Form of petroleum primarily used in road construction

Bitumen (UK: BIH-chuum-in, US: bih-TEW-min, by-) is an immensely viscous constituent of petroleum. Depending on its exact composition, it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales. In American English, the material is commonly referred to as asphalt.

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