The Collaborative International Dictionary
Biacid
Biacid \Bi*ac"id\, a. [Pref. bi- + acid.] (Chem.) Having two hydrogen atoms which can be replaced by negative atoms or radicals to form salts; -- said of bases. See Diacid.
Wiktionary
biacid
a. (context chemistry of a base English) Having two hydrogen atoms that can be replaced by negative atoms or radicals to form salts.