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Dictionary Language resources

scoria

Pronunciation: /ˈskɔːrɪə/

Definition of scoria

noun (plural scoriae /-rɪiː/)

[mass noun]

1basaltic lava ejected as fragments from a volcano, typically with a frothy texture: chunks of black scoria [count noun]:the village lay half silted up under black scoriae and dust

2slag separated from molten metal during smelting: the scoria has been expelled completely from the mercury

Derivatives

scoriaceous

Origin:

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