niobium

Noun

ni=o=bi=um

CIDE DICTIONARY

niobium, n. [NL., fr. L. & E. Niobe.].

The chemical element of atomic number 41. Chemical symbol Nb. Atomic weight 92.91. Previously called columbium. See also Columbium. [1913 Webster]

niobium, n. Chem. a rare grey-blue metallic transition element occurring naturally in several minerals and used in alloys for superconductors.

Usage

Symb.: Nb. Also called COLUMBIUM.

Derivative

niobic adj. niobous adj.

Etymology

Niobe daughter of Tantalus: so called because first found in TANTALITE

For further exploring for "niobium" in Webster Dictionary Online

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