scoria


Concise Oxford English Dictionary © 2008 Oxford University Press:
scoria /ˈskɔːrɪə/
noun (pl. scoriae /-rɪiː/)
  • 1 basaltic lava ejected as fragments from a volcano, typically with a frothy texture.
  • 2 slag separated from molten metal during smelting.
– derivatives
scoriaceous /-ˈeɪʃəs/ adjective.
– origin ME: via L. from Gk skōria ‘refuse’, from skōr ‘dung’.
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