rock salt

American  

noun

1. common salt occurring in extensive, irregular beds in rocklike masses.

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rock salt British  

noun

1. another name for halite

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Etymology

Origin of rock salt

First recorded in 1700–10

Example Sentences

To stabilize these ceramics, manganese and iron atoms must remain in the 2+ oxidation state, forming what is known as a rock salt structure where each atom bonds with only two oxygen atoms.

From Science Daily

Also popular are the Peking duck, baked free-range chicken with rock salt, diced beef tenderloin with black pepper and the pan-fried eggplant.

From Seattle Times

It also warns owners to wash their paws thoroughly after walking in areas that may have been gritted with rock salt, which can be poisonous to pets.

From BBC

Supplies of rock salt and snow shovels were flying off shelves on Tuesday at Rocky's Ace Hardware in Worcester, Massachusetts, west of Boston, said the manager, Joshua Rivera.

From Reuters

In my adult life as a contractor, I mostly come into contact with the powdery substance thanks to the rock salt used on the roads in central New Hampshire during snowstorms and icy conditions.

From Seattle Times