columbium

POS

Noun

HYPHEN

co=lum=bi=um

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CIDE DICTIONARY

columbium, n. [NL., fr. Columbia America.].

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. [1913 Webster]

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OXFORD DICTIONARY

columbium, n. US Chem. = NIOBIUM.

For further exploring for "columbium" in Webster Dictionary Online

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