rock salt

noun

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

rock salt

noun

1. See halite
   another name for halite

Word History and Origins

Origin of rock salt¹

First recorded in 1700–10

Example Sentences

Even the chandeliers casting a golden glow on many of the rooms are made from rock salt.

From The Daily Beast

But I stand by my recommendation that the U.S. government “replenish its strategic reserves of rock salt without delay.”

From The Daily Beast

Eventually the entire cavity is filled with salt, and a solid mass of rock salt remains.

From Project Gutenberg

Embedded in the Cambrian strata there are great deposits of rock salt at Kheora, where the Mayo mine is situated.

From Project Gutenberg

Rock-salt, which occurs in abundance, is possibly the most important mineral in this area.

From Project Gutenberg

Gypsum occurs in large quantities in association with the rock-salt of the Salt Range, but the local demand is small.

From Project Gutenberg

They are both known in commerce under the name of “bay-salt,” to distinguish them from the “rock-salt” of the mines.

From Project Gutenberg