Dibasic \Di*ba"sic\, a. [Pref. di- + basic.] (Chem.)
Having two acid hydrogen atoms capable of replacement by
basic atoms or radicals, in forming salts; bibasic; -- said
of acids, as oxalic or sulphuric acids. Cf. {Diacid},
{Bibasic}.
[1913 Webster]
Note: In the case of certain acids dibasic and divalent are
not synonymous; as, tartaric acid is tetravalent and
dibasic, lactic acid is divalent but monobasic.
[1913 Webster]