Lewis Short
(adjective) : salmăcĭdus, a, um, contr. from salgama, salma, and acidus, of water
* Having a salt and sour taste, salso-acid: salmacidum ἁλμυρόν, salmacidus ἁλμυρός, ἁλώδης, Gloss. Philox. (post-Aug.): aquae (with nitrosae),Plin. 31, 3, 22, § 36: aqua (opp. dulcis),Plin. Val. 5, 41 fin.: fluvii,Flor. 4, 10, 8.
Charlton T. Lewis, Charles Short, A Latin Dictionary