(n.) The recrement of metals in fusion, or the slag rejected after the reduction of metallic ores; dross.
(n.) Cellular slaggy lava; volcanic cinders.
Example Sentences:
(1) Scoria (volcanic cinder) was most effective in excluding roots of crested wheatgrass and streambank wheatgrass.
Scorifier
Definition:
(n.) One who, or that which, scorifies; specifically, a small flat bowl-shaped cup used in the first heating in assaying, to remove the earth and gangue, and to concentrate the gold and silver in a lead button.