We found 27 dictionaries that define the word columbium:

General (20 matching dictionaries)

1. columbium: Merriam-Webster
2. columbium: Oxford Learner's Dictionaries
3. columbium: American Heritage Dictionary of the English Language
4. columbium: Collins English Dictionary
5. columbium: Vocabulary.com
6. columbium: Wordnik
7. columbium: Wiktionary
8. columbium: Webster's New World College Dictionary, 4th Ed.
9. columbium: The Wordsmyth English Dictionary-Thesaurus
10. columbium: Infoplease Dictionary
11. columbium: Dictionary.com
12. Columbium: Wikipedia, the Free Encyclopedia
13. Columbium: Online Plain Text English Dictionary
14. columbium: Webster's Revised Unabridged, 1913 Edition
15. columbium: Rhymezone
16. Columbium: AllWords.com Multi-Lingual Dictionary
17. columbium: Webster's 1828 Dictionary
18. columbium: FreeDictionary.org
19. columbium: Mnemonic Dictionary
20. columbium: TheFreeDictionary.com

Computing (1 matching dictionary)

21. columbium: Encyclopedia

Medicine (3 matching dictionaries)

22. columbium: Merriam-Webster Medical Dictionary
23. online medical dictionary (No longer online)
24. columbium: Medical dictionary

Tech (3 matching dictionaries)

25. Metal Terminology (No longer online)
26. AUTOMOTIVE TERMS (No longer online)
27. Glossary of Fastener Terms (No longer online)

(Note: See columbiums as well.)

Definitions from Wiktionary (columbium) ▸ noun:  (obsolete) A former name of niobium. Similar: colombium, columbite, polymignyte, niobium, niobite, polymignite, unnilbium, dianium, ferrocolumbite, pelopium, more... Opposite: tantalum, niobium Types: niobium, more... ▸ Words similar to columbium ▸ Usage examples for columbium ▸ Idioms related to columbium ▸ Wikipedia articles (New!) ▸ Popular adjectives describing columbium ▸ Words that often appear near columbium ▸ Rhymes of columbium ▸ Invented words related to columbium