a. 二元的, 二碱价的

[医] 二硷的, 二元的, 二代的

Bibasic \Bi*ba"sic\, a. [Pref. bi- + basic.] (Chem.)
Having to hydrogen atoms which can be replaced by positive or
basic atoms or radicals to form salts; -- said of acids. See
{Dibasic}.