We found 30 dictionaries that define the word tantalum:

General (20 matching dictionaries)

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

Art (1 matching dictionary)

21. An Etymological Dictionary of Classical Mythology (No longer online)

Computing (1 matching dictionary)

22. tantalum: Encyclopedia

Medicine (5 matching dictionaries)

23. tantalum: Merriam-Webster Medical Dictionary
24. Dorland's Illustrated Medical Dictionary (No longer online)
25. Medical Dictionary (No longer online)
26. online medical dictionary (No longer online)
27. tantalum: Medical dictionary

Science (2 matching dictionaries)

28. Tantalum: Extragalactic Astronomy
29. tantalum: WebElements Periodic Table of the Elements

Tech (1 matching dictionary)

30. Tantalum: Glossary of Mining Terms

(Note: See tantalums as well.)

Definitions from Wiktionary (tantalum) ▸ noun:  A chemical element (symbol Ta) with atomic number 73: a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Similar: ta, atomic number 73, tantalite, thulium, terbium, thallium, tantalcarbide, radiotantalum, titanium, tantite, more... Opposite: non-metal, non-conductive. Types: capacitor, resistor, conductor, semiconductor, more... Phrases: tantalum oxide, Tantalum carbide, Tantalum nitride, Tantalum capacitor, Tantalum pentoxide, more... Adjectives: pure, metallic, powdered, solid, niobium, columbium, porous, unalloyed, ductile, nickel, radioactive ▸ Words similar to tantalum ▸ Usage examples for tantalum ▸ Idioms related to tantalum ▸ Wikipedia articles (New!) ▸ Popular adjectives describing tantalum ▸ Words that often appear near tantalum ▸ Rhymes of tantalum ▸ Invented words related to tantalum