columbium
/kəˈlʌmbiəm/
noun
- An older name for the chemical element niobium, a gray metal used in alloys and superconductors.
- The chemist discovered columbium in a sample of ore from Connecticut.
- Some industries still use the name columbium for the metal in high-strength steel alloys.
- In older textbooks, the element niobium is sometimes called columbium.
Synonyms