columbium

(kə lumbē əm)

noun

niobium

Origin: ModL: so named (1801) by C. Hatchett (1765-1847), Brit chemist < Columbia + -ium, because the ore had been brought from Massachusetts

See columbium in American Heritage Dictionary 4

noun Symbol Cb
Niobium. No longer in scientific use.

Origin:

Origin: After Columbia2

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