Part of speech: noun

A granitic rock.

Part of speech: adjective

Gnelssic, gneissold.

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Usage examples "gneiss":

  1. Clermont, metalliferous gneiss near. - "The Student's Elements of Geology", Sir Charles Lyell.
  2. He found true erratics- loose pebbles, granite, gneiss, and granitic sandstone, having no resemblance to any native rock in the vicinity- scattered over the whole surface of the hill to its very summit. - "Louis Agassiz: His Life and Correspondence", Louis Agassiz.
  3. Granite and gneiss, overlaid with hard dark sandstone and masses of secondary limestone, form as it were the skeleton of the country. - "Patriarchal Palestine", Archibald Henry Sayce.