COLUMBIUM
Meaning of COLUMBIUM in English
/keuh lum"bee euhm/ , n. Chem.
(formerly) niobium. Symbol: Cb
[ 1801; COLUMB(IA) (def. 7) + -IUM ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012