American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
Lothspeich said he is open to selling the subsurface rights, which include "coal, scoria, uranium, sand, gravel, the whole works," to anyone who gives him $2.5 million.— Philly.com - Latest Videos
The combination of the wood condensing due to the pressure of carving and the paint layer on the letters has meant that the surrounding wood has been more susceptible to abrasion by the wind and scoria, so the inscription now actually stands proud, and is in danger of shearing off from the cross.— Museum Blogs
The scoria is loose and gravelly, and covered in weird fern-like creepers.

American Heritage Dictionary (1)
Century Dictionary (1)
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