COLUMBIUM

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

A former name for niobium

Classified under:

Nouns denoting substances

Hypernyms ("columbium" is a kind of...):

atomic number 41; Nb; niobium (a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium)

Credits