Synset:Nb niobium
Substance Holonyms:columbite niobite
Hypernyms:metal metallic element
Inherited Hypernyms:niobiummetallic elementchemical elementsubstancematterphysical entityentity
Inherited Hypernyms:niobiummetallic elementchemical elementsubstancepartrelationabstractionentity
Direct Hyponyms:columbium
Full Hyponyms:
columbium