SCORIA

Pronunciation (US): (GB):

Irregular inflected form: scoriae

Meaning:

The scum formed by oxidation at the surface of molten metals

Synonyms:

dross; scoria; slag

Classified under:

Nouns denoting substances

Hypernyms ("scoria" is a kind of...):

scum (a film of impurities or vegetation that can form on the surface of a liquid)

Hyponyms (each of the following is a kind of "scoria"):

basic slag (slag produced in making steel; low in silica but having large amounts of calcium phosphate; useful as fertilizer)