• Bituminous

    Origin

    From French bitumineux

    Full definition of bituminous

    Adjective

    bituminous

    1. Of or pertaining to bitumen.

    Noun

    bituminous

    (countable and uncountable; plural bituminouss)
    1. (uncountable) Bituminous coal.
    2. (countable) A type or grade of bituminous coal.
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