We found 26 dictionaries that define the word polonium:

General (17 matching dictionaries)

1. polonium: Merriam-Webster
2. polonium: Oxford Learner's Dictionaries
3. polonium: American Heritage Dictionary of the English Language
4. polonium: Collins English Dictionary
5. polonium: Vocabulary.com
6. Polonium, polonium: Wordnik
7. polonium: Cambridge Advanced Learner's Dictionary
8. polonium: Wiktionary
9. polonium: Webster's New World College Dictionary, 4th Ed.
10. polonium: The Wordsmyth English Dictionary-Thesaurus
11. polonium: Infoplease Dictionary
12. polonium: Dictionary.com
13. Polonium: Wikipedia, the Free Encyclopedia
14. polonium: Rhymezone
15. polonium: FreeDictionary.org
16. polonium: Mnemonic Dictionary
17. polonium: TheFreeDictionary.com

Business (1 matching dictionary)

18. polonium: Financial dictionary

Computing (1 matching dictionary)

19. polonium: Encyclopedia

Medicine (5 matching dictionaries)

20. polonium: Merriam-Webster Medical Dictionary
21. Dorland's Illustrated Medical Dictionary (No longer online)
22. Medical Dictionary (No longer online)
23. online medical dictionary (No longer online)
24. polonium: Medical dictionary

Science (2 matching dictionaries)

25. Polonium: Extragalactic Astronomy
26. Polonium, polonium: WebElements Periodic Table of the Elements

Definitions from Wiktionary (polonium) ▸ noun:  A rare, highly radioactive chemical element (symbol Po) with atomic number 84. Similar: po, atomic number 84, polonium-210, proton, protonium, pionium, protron, oganesson, pbar, positronium, more... Phrases: polonium 210, Isotopes of polonium, more... Adjectives: radioactive, pure, new, separate, first, metallic, emitting, more, natural, isolated, active ▸ Words similar to polonium ▸ Usage examples for polonium ▸ Idioms related to polonium ▸ Wikipedia articles (New!) ▸ Popular adjectives describing polonium ▸ Words that often appear near polonium ▸ Rhymes of polonium ▸ Invented words related to polonium