Scoria
Pronunciation : Sco"ri*a
Part of Speech : n.;
Etymology : [L., fr. Gr.
Definition : 1. The recrement of metals in fusion, or the slag rejected after the eduction of metallic ores; dross.
2. Cellular slaggy lava; volcanic cinders.
pl. Scorl
Source : Webster's Unabridged Dictionary, 1913