niobium: Meaning and Definition of

ni•o•bi•um

Pronunciation: (nī-ō'bē-um), [key]
— n. Chem.
  1. a steel-gray metallic element resembling tantalum in its chemical properties; becomes a superconductor below 9 K; used chiefly in alloy steels. Symbol: Nb; at. no.: 41; at. wt.: 92.906; sp. gr.: 8.4 at 20°C.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
Niobid niobous
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