COLUMBIUM

columbium

(noun) a former name for niobium

Source: WordNet® 3.1

Etymology

Noun

columbium (usually uncountable, plural columbiums)

(obsolete) A former name of niobium.

Source: Wiktionary

Co*lum"bi*um, n. Etym: [NL., fr. Columbia America.] (Chem.)

Definition: 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’s Unabridged Dictionary 1913 Edition

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