scoria
sco·ria
noun \ˈskȯr-ē-ə\ plural sco·ri·ae\-ē-ˌē, -ē-ˌī\
Definition of SCORIA
1
: the refuse from melting of metals or reduction of ores : slag
2
: rough vesicular cindery lava
— sco·ri·a·ceous \ˌskȯr-ē-ˈā-shəs\ adjective
See Origin of SCORIA
Middle English, from Latin, from Greek skōria, from skōr excrement — more at scatology
First Known Use: 14th century
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