We found 15 dictionaries that define the word plesiosauria:

General (13 matching dictionaries)

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

Computing (1 matching dictionary)

14. Plesiosauria: Encyclopedia

Medicine (1 matching dictionary)

15. online medical dictionary (No longer online)

Definitions from WordNet (Plesiosauria) ▸ noun:  any of the plesiosaurs Phrases: suborder plesiosauria, more... ▸ Words similar to plesiosauria ▸ Usage examples for plesiosauria ▸ Idioms related to plesiosauria ▸ Wikipedia articles (New!) ▸ Popular adjectives describing plesiosauria ▸ Words that often appear near plesiosauria ▸ Rhymes of plesiosauria ▸ Invented words related to plesiosauria