• Gneiss

    Pronunciation

    • enPR: nÄ«s, IPA: /ˈnaɪs/
    • Rhymes: -aɪs
    • Homophones: nice

    Origin

    From German Gneis, from Middle High German gneist ("spark"), from Old High German gneisto ("spark"). More at gnast.

    Full definition of gneiss

    Noun

    gneiss

    (usually uncountable; plural gneisses)
    1. (geology) A common and widely-distributed metamorphic rock having bands or veins, but not schistose.
      • 2004, Richard Fortey, The Earth, Folio Society 2011, p. 98:The old towns along the route are as solidly built from the gneiss of the region as you might expect.

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