Definition of scoria in English:

scoria

Syllabification: sco·ri·a
Pronunciation: /ˈskôrēə
 
/

noun (plural scoriae /ˈskôrē-ē/)

1A cindery, vesicular basaltic lava, typically having a frothy texture.
More example sentences
  • They cut steps in the frozen snow and made good progress along a ridge of ‘rugged scoriae’ which took them to the summit.
  • Small vesicular pieces of volcanic material, scoria, collect around the vent to form a cinder cone.
  • Alluvial, colluvial or chemically formed gravel, clayey gravel, sandstone, limestone, tuff, scoria are examples of marginal materials.
1.1Slag separated from molten metal during smelting.

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.

Derivatives

scoriaceous

Pronunciation: /ˌskôrēˈāSHəs/
adjective
More example sentences
  • The fine-grained ash groundmass contains equal proportions of scoriaceous tachylite and palagonite with basaltic lithic fragments.
  • On the western side of the mesa, black hornblende xenocrysts several centimeters in size are also found in a scoriaceous, agglomeratic portion of the lava flow.
  • Amygdaloidal cavities are located immediately below the uppermost scoriaceous part of the second flow, near its contact with the overlying flow.

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Pronunciation: kənˈspɪkjʊəs
adjective
clearly visible