We found 12 dictionaries that define the word arboreta:

General (10 matching dictionaries)

1. arboreta: Merriam-Webster
2. arboreta: Oxford Learner's Dictionaries
3. arboreta: Collins English Dictionary
4. arboreta: Vocabulary.com
5. arboreta: Wiktionary
6. Arboreta, arboreta: Dictionary.com
7. Arboreta: Online Plain Text English Dictionary
8. Arboreta: AllWords.com Multi-Lingual Dictionary
9. arboreta: FreeDictionary.org
10. arboreta: TheFreeDictionary.com

Computing (1 matching dictionary)

11. arboreta: Encyclopedia

Tech (1 matching dictionary)

12. Urban Conservation Glossary (No longer online)

(Note: See arboretum as well.)

Definitions from Wiktionary (arboretum) ▸ noun:  A place where many varieties of tree are grown for research, educational, and ornamental purposes. ▸ Also see arboretum ▸ Words similar to arboreta ▸ Usage examples for arboreta ▸ Idioms related to arboreta ▸ Wikipedia articles (New!) ▸ Popular adjectives describing arboreta ▸ Words that often appear near arboreta ▸ Rhymes of arboreta ▸ Invented words related to arboreta