The Collaborative International Dictionary
Protosalt
Protosalt \Pro"to*salt\, n. [Proto- + salt.] (Chem.) A salt derived from a protoxide base. [Obs.]
Wiktionary
protosalt
n. 1 (context chemistry English) The form of a salt of a particular base / acid combination that has the lowest proportion of base 2 (context chemistry English) A salt derived from a protoxide