( n. )
A supposed rare metallic element, with a characteristic spectrum, found associated with yttrium and other rare metals. Its individuality and properties have not yet been determined.
( n. )
A supposed rare metallic element, with a characteristic spectrum, found associated with yttrium and other rare metals. Its individuality and properties have not yet been determined.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012