co·lum·bi·um /kəˈlʌmbiəm/
鈳[金屬元素]
co·lum·bi·um /kəˈləmbɪəm/ 名詞
鈮
Co·lum·bi·um n. Chem. A rare element of the vanadium group, first found in a variety of the mineral columbite occurring in Connecticut, probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb. Now more commonly called niobium.
◄ ►
columbium
n : a former name for niobium
columbium
The original name for niobium.