Webster's Revised Unabridged Dictionary · 1913

Hydrosalt

Hydrosalt , noun

[Hydro-, 1 + salt.]

(a)
(Chemistry) A salt supposed to be formed by a hydracid and a base.
(b)
(Chemistry) An acid salt.
(c)
(Chemistry) A hydrous salt; a salt combined with water of hydration or crystallization. [Rare]