We found 25 dictionaries that define the word ultra-:

General (20 matching dictionaries)

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

Art (1 matching dictionary)

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

Medicine (3 matching dictionaries)

20. online medical dictionary (No longer online)
21. Neurotrauma Glossary (No longer online)
22. ultra-: Medical dictionary

Miscellaneous (1 matching dictionary)

23. ULTRA-: Acronym Finder

Opposite: infra-, nano-, micro- ▸ Word origin ▸ Words similar to ultra- ▸ Usage examples for ultra- ▸ Idioms related to ultra- ▸ Wikipedia articles (New!) ▸ Words that often appear near ultra- ▸ Rhymes of ultra- ▸ Invented words related to ultra-