We found 14 dictionaries that define the word protohippus:

General (13 matching dictionaries)

1. Protohippus, Protohippus: Merriam-Webster
2. protohippus: Vocabulary.com
3. protohippus: Wordnik
4. Protohippus, protohippus: Dictionary.com
5. Protohippus: Wikipedia, the Free Encyclopedia
6. Protohippus: Online Plain Text English Dictionary
7. protohippus: Webster's Revised Unabridged, 1913 Edition
8. protohippus: Rhymezone
9. Protohippus: AllWords.com Multi-Lingual Dictionary
10. protohippus: FreeDictionary.org
11. protohippus: Mnemonic Dictionary
12. Protohippus, Protohippus: TheFreeDictionary.com

Medicine (1 matching dictionary)

13. online medical dictionary (No longer online)

Definitions from Wikipedia (Protohippus) ▸ noun:  an extinct three-toed genus of horse. Phrases: genus protohippus, more... ▸ Words similar to protohippus ▸ Usage examples for protohippus ▸ Idioms related to protohippus ▸ Wikipedia articles (New!) ▸ Popular adjectives describing protohippus ▸ Words that often appear near protohippus ▸ Rhymes of protohippus ▸ Invented words related to protohippus