We found 32 dictionaries that define the word rattlesnake:

General (25 matching dictionaries)

1. rattlesnake: Longman Dictionary of Contemporary English
2. rattlesnake: Merriam-Webster
3. rattlesnake: Oxford Learner's Dictionaries
4. rattlesnake: American Heritage Dictionary of the English Language
5. rattlesnake: Collins English Dictionary
6. rattlesnake: Vocabulary.com
7. Rattlesnake, rattlesnake: Wordnik
8. rattlesnake: Cambridge Advanced Learner's Dictionary
9. rattlesnake: Wiktionary
10. rattlesnake: Webster's New World College Dictionary, 4th Ed.
11. rattlesnake: The Wordsmyth English Dictionary-Thesaurus
12. rattlesnake: Infoplease Dictionary
13. rattlesnake: Dictionary.com
14. rattlesnake: Cambridge Essential American English Dictionary
15. Rattlesnake (Tampa), Rattlesnake (The Strumbellas album), Rattlesnake (disambiguation), Rattlesnake (film), Rattlesnake (roller coaster), Rattlesnake (song), Rattlesnake, Rattlesnake, The Rattlesnake (Remington), The Rattlesnake (film): Wikipedia, the Free Encyclopedia
16. Rattlesnake: Online Plain Text English Dictionary
17. rattlesnake: Webster's Revised Unabridged, 1913 Edition
18. rattlesnake: Rhymezone
19. Rattlesnake: AllWords.com Multi-Lingual Dictionary
20. rattlesnake: Webster's 1828 Dictionary
21. rattlesnake: FreeDictionary.org
22. rattlesnake: Mnemonic Dictionary
23. rattlesnake: TheFreeDictionary.com

Computing (1 matching dictionary)

24. rattlesnake: Encyclopedia

Medicine (4 matching dictionaries)

25. rattlesnake: Merriam-Webster Medical Dictionary
26. Dorland's Illustrated Medical Dictionary (No longer online)
27. online medical dictionary (No longer online)
28. rattlesnake: Medical dictionary

Miscellaneous (1 matching dictionary)

29. Brilliant Dream Dictionary (No longer online)

Slang (1 matching dictionary)

30. rattlesnake: Urban Dictionary

(Note: See rattlesnakes as well.)

Definitions from Wiktionary ( ) ▸ noun:  Any of various venomous American snakes, of genera Crotalus and Sistrurus, having a rattle at the end of its tail. Similar: rattler, rattle snake, sand viper, thunder snake, coontail, diamondback rattlesnake, rock snake, crotaline, stiletto snake, massasauga, more... Opposite: mongoose, weasel, ferret, badger, hedgehog Types: diamondback, sidewinder, cottonmouth, copperhead, moccasin, more... Phrases: diamondback rattlesnake, rattlesnake bite, Timber rattlesnake, prairie rattlesnake, rattlesnake master, more... Adjectives: large, western, coiled, big, huge, eastern, live, small, american, dead, foot Colors:     brown,     olive,     tan,     gray,     beige, more... ▸ Words similar to rattlesnake ▸ Usage examples for rattlesnake ▸ Idioms related to rattlesnake ▸ Wikipedia articles (New!) ▸ Popular adjectives describing rattlesnake ▸ Words that often appear near rattlesnake ▸ Rhymes of rattlesnake ▸ Invented words related to rattlesnake