( n. )
A crust or hard coating of anything upon or within a body, as a deposit of lime, sediment, etc., from water on the inner surface of a steam boiler.
( n. )
A crust or hard coating of anything upon or within a body, as a deposit of lime, sediment, etc., from water on the inner surface of a steam boiler.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012