scoria

scoria
[ˈskɔːrɪə]
(pl. scoriae -rɪiː)
  1. [mass noun]basaltic lava ejected as fragments from a volcano, typically with a frothy texture
    火山喷出的（尤指泡沫质地的）玄武岩火山石碎块
    ■slag separated from molten metal during smelting
    （熔炼时从熔化了的金属中分离出来的）矿渣
派生
scoriaceous
[-ˈeɪʃəs]
adjective
语源
  1. late Middle English (denoting slag from molten metal): via Latin from Greek skōria 'refuse', from skōr 'dung'. The geological term dates from the late 18th cent
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