( n. )
A rare earth, regarded by some as an oxide of the supposed element gadolinium, by others as only a mixture of the oxides of yttrium, erbium, ytterbium, etc.
( n. )
A rare earth, regarded by some as an oxide of the supposed element gadolinium, by others as only a mixture of the oxides of yttrium, erbium, ytterbium, etc.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012