We found 29 dictionaries that define the word estrus:

General (18 matching dictionaries)

1. estrus: Merriam-Webster
2. estrus: Oxford Learner's Dictionaries
3. estrus: American Heritage Dictionary of the English Language
4. estrus: Collins English Dictionary
5. estrus: Vocabulary.com
6. Estrus, estrus: Wordnik
7. estrus: Wiktionary
8. estrus: Webster's New World College Dictionary, 4th Ed.
9. estrus: The Wordsmyth English Dictionary-Thesaurus
10. estrus: Infoplease Dictionary
11. estrus: Dictionary.com
12. estrus: Online Etymology Dictionary
13. Estrus (EP), Estrus (disambiguation), Estrus: Wikipedia, the Free Encyclopedia
14. estrus: Rhymezone
15. estrus: FreeDictionary.org
16. estrus: Mnemonic Dictionary
17. estrus: TheFreeDictionary.com

Computing (1 matching dictionary)

18. estrus: Encyclopedia

Medicine (4 matching dictionaries)

19. estrus: Merriam-Webster Medical Dictionary
20. Dorland's Illustrated Medical Dictionary (No longer online)
21. Medical Dictionary (No longer online)
22. estrus: Medical dictionary

Science (2 matching dictionaries)

23. Agricultural Thesaurus and Glossary (No longer online)
24. Anthropology dictionary (No longer online)

Sports (1 matching dictionary)

25. Cat Terms (No longer online)

Tech (3 matching dictionaries)

26. Agriculture Glossary (No longer online)
27. Dairy Glossary (No longer online)
28. Washington State Definitions and Abbreviations of Vetrinary Terms (No longer online)

Definitions from Wiktionary ( ) ▸ noun:  (American spelling) Alternative spelling of oestrus [(countable) A biting fly of the genus Oestrus; a botfly.] Similar: heat, oestrus, rut, estrous, oestrous, anestrus, diestrus, proestrus, anestrous, mating, more... Opposite: anestrus, diestrus, proestrus Types: rut, more... Phrases: estrus cycle, estrus detection, estrus synchronization, silent estrus, estrus induction, more... Adjectives: first, persistent, behavioral, vaginal, constant, early, next, normal, second, late, full Colors:     red,     pink,     orange,     magenta,     crimson, more... ▸ Word origin ▸ Words similar to estrus ▸ Usage examples for estrus ▸ Idioms related to estrus ▸ Wikipedia articles (New!) ▸ Popular adjectives describing estrus ▸ Words that often appear near estrus ▸ Rhymes of estrus ▸ Invented words related to estrus