- 1. n. 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. Source: opted
- 2. n. a former name for niobium Source: wordnet
- 3. 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. Source: webster
- 4. A rare element of the vanadium group, first found in a varietyof the mineral columbite occurring in Connecticut, probably atHaddam. Atomic weight 94.2. Symbol Cb or Nb. Now more commonly calledniobium. Source: adambom
- 5. n a former name for niobium Source: ecdict
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columbium
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niobiumcolumbiteatomiccommonlyConnecticutelementfirstfoundgroupmineralnowoccurringprobablyraresymbolvanadiumweightcalledformernamevariety