We found 23 dictionaries that define the word carbon 14:

General (14 matching dictionaries)

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

Business (1 matching dictionary)

15. carbon 14: Legal dictionary

Computing (1 matching dictionary)

16. carbon-14, carbon 14: Encyclopedia

Medicine (4 matching dictionaries)

17. carbon 14: Merriam-Webster Medical Dictionary
18. Dorland's Illustrated Medical Dictionary (No longer online)
19. online medical dictionary (No longer online)
20. carbon-14, carbon 14: Medical dictionary

Science (2 matching dictionaries)

21. Archaeology Wordsmith (No longer online)
22. Atmospheric Chemistry and Air Quality (No longer online)

Slang (1 matching dictionary)

23. Carbon-14: Urban Dictionary

Definitions from WordNet (carbon 14) ▸ noun:  a radioactive isotope of carbon Phrases: carbon 14 dating, more... ▸ Words similar to carbon 14 ▸ Usage examples for carbon 14 ▸ Idioms related to carbon 14 ▸ Wikipedia articles (New!) ▸ Words that often appear near carbon 14 ▸ Rhymes of carbon 14 ▸ Invented words related to carbon 14