• Lias

    Pronunciation

    • UK IPA: /ˈlaɪəs/

    Origin

    Originally dialectal, from Old French liois ("compact limestone") (French liais).

    Full definition of lias

    Noun

    lias

    (uncountable)
    1. A type of blue limestone present in parts of southern England.
    2. (geology) A stratigraphic group from the lower Jurassic period, consisting of thin layers of blue limestone.
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