We found 26 dictionaries that define the word estival:

General (14 matching dictionaries)

1. estival: Merriam-Webster
2. estival: Wordnik
3. estival: Cambridge English Dictionary
4. estival: American Heritage Dictionary of the English Language
5. estival: Collins English Dictionary
6. estival: Vocabulary.com
7. estival: Webster's New World College Dictionary, 4th Ed.
8. estival (aestival): The Wordsmyth English Dictionary-Thesaurus
9. estival: Random House Unabridged Dictionary (1997)
10. estival: Dictionary.com
11. estival: Rhymezone (WordNet)
12. estival: The Phrontistery - A Dictionary of Obscure Words
13. estival: Mnemonic Dictionary
14. estival: TheFreeDictionary.com (American Heritage)

General (historical) (3 matching dictionaries)

15. estival (1755), estival (1773): Samuel Johnson's Dictionary
16. estival: Middle English Dictionary
17. estival: Webster's 1828 Dictionary

User-edited (1 matching dictionary)

18. estival: Wiktionary

Art (3 matching dictionaries)

19. Paris Cookbook (No longer online)
20. Epicurus.com French Glossary (No longer online)
21. Epicurus.com Food Glossary (No longer online)

Medicine (3 matching dictionaries)

22. estival: Merriam-Webster Medical Dictionary
23. Dorland's Illustrated Medical Dictionary (No longer online)
24. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

25. estival, estival: A Word A Day

Tech (1 matching dictionary)

26. Glossary of Meteorology (No longer online)

(Note: See estivals as well.)

Definitions from Wiktionary (estival) ▸ adjective:  Of or relating to summer. ▸ adjective:  Coming forth in the summer. Similar: summery, aestival, aestive, summersome, midsummery, festal, aestivoautumnal, seasonal, celebrational, carnivalistic, more... Opposite: hibernal, winterly, wintry ▸ Words similar to estival ▸ Usage examples for estival ▸ Idioms related to estival ▸ Wikipedia articles ▸ Popular nouns described by estival ▸ Words that often appear near estival ▸ Rhymes of estival ▸ Invented words related to estival