from
The Collaborative International Dictionary of English v.0.48
Muriate \Mu"ri*ate\, n. [See {Muriatic}.] (Chem.)
A salt of muriatic hydrochloric acid; a chloride; as, muriate
of ammonia.
[1913 Webster]
Note: This term, as also the word muriatic, was formerly
applied to the chlorides before their true composition
was understood, and while they were erroneously
supposed to be compounds of an acid with an oxide.
Muriate and muriatic are still occasionally used as
commercial terms, but are obsolete in scientific
language.
[1913 Webster]