slag

Definitions of slag
1

n the scum formed by oxidation at the surface of molten metals

Synonyms:
dross, scoria
Types:
basic slag
slag produced in making steel; low in silica but having large amounts of calcium phosphate; useful as fertilizer
Type of:
scum
a film of impurities or vegetation that can form on the surface of a liquid

v convert into slag

Type of:
convert
change the nature, purpose, or function of something

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.