Meaning of TANTALUM in English
( n. )
A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012