: salt that is in the form of large pieces or crystals : rock salt
In crystals of halite there are ions of two different kinds … The smaller ones are those of sodium, and the larger ones are those of chlorine.—Sheldon Judson and Marvin E. Kauffman
Halite occurs chiefly in sedimentary rocks where it has been deposited by evaporation from sea water or salt lakes …—W. A. Deer et al.
A small, choppy gravel road off state highway 178 takes us to the heart of this truly lunar landscape. The pinnacles surround us. Made of silty halite, they stand up to 2 ft. high. They are formed of the salt left behind from the evaporation of ground water.—Scott Oldham
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Merriam-Webster unabridged
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