[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
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