rock salt
noun/ˈrɒk sɔːlt/, /ˈrɒk sɒlt/
/ˈrɑːk sɔːlt/
[uncountable]- a kind of salt that comes from the ground compare sea salt
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
Check pronunciation:
rock salt