scoriayoudaoicibaDictYouDict[scoria 词源字典]
"Basaltic lava ejected as fragments from a volcano, typically with a frothy texture", 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 century.[scoria etymology, scoria origin, 英语词源]