( n. )
The substance which remains when a metal or mineral has been subjected to calcination or combustion by heat, and which is, or may be, reduced to a fine powder.
( n. )
The substance which remains when a metal or mineral has been subjected to calcination or combustion by heat, and which is, or may be, reduced to a fine powder.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012