天火字典

英英字典： columbium

columbium

(TTS Sound)

KK Pronunciation

〔 kәˋlʌmbIәm 〕

Pronunciation

〔 kәˊlʌmbiәm 〕

Overview of noun columbium

The noun columbium has 1 sense

columbium -- (a former name for niobium)

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