A dibasic acid is an acid that has two hydrogen ions to donate to a base in an acid-base reaction. Therefore, a dibasic molecule has two replaceable hydrogen atoms. Example: H2SO4. ...
An acid containing two ionizable atoms of hydrogen in the molecule. ... (05 Mar 2000) ... 
Type: Term Definitions: 1. an acid containing two ionizable atoms of hydrogen in the molecule. See: acid1
[n] - an acid containing two replaceable hydrogen atoms per molecule
noun an acid containing two replaceable hydrogen atoms per molecule