( n. )
Scoria or vitrified incombustible matter, formed in a grate or furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag.
( n. )
Scoria or vitrified incombustible matter, formed in a grate or furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012