We found 37 dictionaries that define the word free radical:

General (19 matching dictionaries)

1. free radical: Merriam-Webster
2. free radical: Oxford Learner's Dictionaries
3. free radical: American Heritage Dictionary of the English Language
4. free radical: Collins English Dictionary
5. free radical: Vocabulary.com
6. free-radical: Wordnik
7. free radical: Cambridge Advanced Learner's Dictionary
8. free radical: Wiktionary
9. free radical: The Wordsmyth English Dictionary-Thesaurus
10. free radical: Infoplease Dictionary
11. free radical: Dictionary.com
12. Free Radical (magazine), Free-radical, Free radical (disambiguation), Free radical: Wikipedia, the Free Encyclopedia
13. free radical: Rhymezone
14. free radical: FreeDictionary.org
15. free radical: Mnemonic Dictionary
16. free radical: TheFreeDictionary.com
17. free radical: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

18. free radical: Legal dictionary

Computing (1 matching dictionary)

19. free radical: Encyclopedia

Medicine (11 matching dictionaries)

20. free radical: Merriam-Webster Medical Dictionary
21. Dorland's Illustrated Medical Dictionary (No longer online)
22. free radical: Natural Health glossary
23. online medical dictionary (No longer online)
24. Hepatitis C Information Central (No longer online)
25. AIDS Medical Glossary and Drug Chart (No longer online)
26. free radical: Dictionary of Cancer Terms
27. Glossary of HIV/AIDS Related Terms (No longer online)
28. free radical: Medical dictionary
29. Vitamin Glossary (No longer online)
30. Hyperdictionary (No longer online)

Science (2 matching dictionaries)

31. Chemistry Dictionary (No longer online)
32. Free Radical: Eric Weisstein's World of Chemistry

Slang (1 matching dictionary)

33. Free Radical: Urban Dictionary

Tech (2 matching dictionaries)

34. Liquid Crystal (No longer online)
35. Glossary of Meteorology (No longer online)

(Note: See free_radicals as well.)

Definitions from Wiktionary (free radical) ▸ noun:  (chemistry, physics) A molecule, ion or atom that has one or more unpaired electrons, and which is generally highly reactive (and therefore often occurs only as a transient species). Similar: radical, oxyradical, radical ion, diradical, pseudoradical, heteroradical, radical anion, triradical, radical cation, tetraradical, more... Opposite: stable, inert, non-reactive Types: superoxide, hydroxyl, nitric oxide, peroxynitrite, carbonate radical, alkoxyl, more... Phrases: free radical scavengers, free radical reaction, Free Radical Design, more... Adjectives: benzylated, monoazo, trifunctional, monocyclic, butylated, deoxy, vinylogous, arylated, acrylic, monohydric, dihydroxy ▸ Words similar to free radical ▸ Usage examples for free radical ▸ Idioms related to free radical ▸ Wikipedia articles (New!) ▸ Words that often appear near free radical ▸ Rhymes of free radical ▸ Invented words related to free radical