We found 24 dictionaries that define the word rock salt:

General (20 matching dictionaries)

1. rock salt: Longman Dictionary of Contemporary English
2. rock salt: Merriam-Webster
3. rock salt: Oxford Learner's Dictionaries
4. rock salt: American Heritage Dictionary of the English Language
5. rock salt: Collins English Dictionary
6. rock salt: Vocabulary.com
7. rock-salt, rock salt: Wordnik
8. rock salt: Cambridge Advanced Learner's Dictionary
9. rock salt: Wiktionary
10. rock salt: The Wordsmyth English Dictionary-Thesaurus
11. rock salt: Infoplease Dictionary
12. Rock salt, rock salt: Dictionary.com
13. Rock-salt, Rock salt: Wikipedia, the Free Encyclopedia
14. rock salt: Rhymezone
15. rock-salt: Webster's 1828 Dictionary
16. rock salt: FreeDictionary.org
17. rock salt: Mnemonic Dictionary
18. rock salt: TheFreeDictionary.com

Computing (1 matching dictionary)

19. Rock-salt, rock salt: Encyclopedia

Medicine (1 matching dictionary)

20. Rock-salt, rock salt: Medical dictionary

Miscellaneous (1 matching dictionary)

21. Encyclopedia of Graphic Symbols (No longer online)

Tech (1 matching dictionary)

22. BBC Food Glossary (No longer online)

(Note: See rock_salts as well.)

Definitions from Wiktionary (rock salt) ▸ noun:  (mineralogy) The mineral halite. ▸ noun:  Coarsely ground common salt, often used as road salt, as feedstock, or for other applications. Similar: halite, common salt, sodium chloride, rocksalt, bisalt, mineral salt, hydrohalite, subsalt, salin, hair salt, more... Types: halite, sodium chloride, nacl, more... ▸ Words similar to rock salt ▸ Usage examples for rock salt ▸ Idioms related to rock salt ▸ Wikipedia articles (New!) ▸ Words that often appear near rock salt ▸ Rhymes of rock salt ▸ Invented words related to rock salt