Meaning of scoria

sco•ri•a

Pronunciation: (skôr'ē-u, skōr'-), [key]
— pl. sco•ri•ae
  1. the refuse, dross, or slag left after melting or smelting metal; scum.
  2. a cinderlike basic cellular lava.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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