The Collaborative International Dictionary
Bibasic
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.
Wiktionary
bibasic
a. (context chemistry English) Having two replaceable hydrogen atoms; dibasic.