We found 22 dictionaries that define the word proto-:

General (18 matching dictionaries)

1. proto-: Merriam-Webster
2. proto-: Oxford Learner's Dictionaries
3. proto-: American Heritage Dictionary of the English Language
4. proto-, proto-: Collins English Dictionary
5. proto-: Wordnik
6. proto-: Cambridge Advanced Learner's Dictionary
7. proto-: Wiktionary
8. proto-: Webster's New World College Dictionary, 4th Ed.
9. proto-: The Wordsmyth English Dictionary-Thesaurus
10. proto-: Infoplease Dictionary
11. Proto-, proto-: Dictionary.com
12. proto-: Online Etymology Dictionary
13. Proto-: Online Plain Text English Dictionary
14. proto-: Webster's Revised Unabridged, 1913 Edition
15. Proto-: AllWords.com Multi-Lingual Dictionary
16. proto-: MyWord.info
17. proto-: FreeDictionary.org
18. proto-: TheFreeDictionary.com

Art (1 matching dictionary)

19. proto-: A Cross Reference of Latin and Greek Elements

Medicine (2 matching dictionaries)

20. online medical dictionary (No longer online)
21. proto-: Medical dictionary

Science (1 matching dictionary)

22. Archaeology Wordsmith (No longer online)

▸ Word origin ▸ Words similar to proto- ▸ Usage examples for proto- ▸ Idioms related to proto- ▸ Wikipedia articles (New!) ▸ Words that often appear near proto- ▸ Rhymes of proto- ▸ Invented words related to proto-