adjective Chemistry.

containing two replaceable or ionizable hydrogen atoms: dibasic acid.
having two univalent, basic atoms, as dibasic sodium phosphate, Na2HPO4.

Origin of dibasic

First recorded in 1865–70; di-1 + basic
Related formsdi·ba·sic·i·ty [dahy-bey-sis-i-tee] /ˌdaɪ beɪˈsɪs ɪ ti/, noun
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Historical Examples of dibasic

British Dictionary definitions for dibasic



(of an acid, such as sulphuric acid, H 2 SO 4) containing two acidic hydrogen atomsCompare diacidic
(of a salt) derived by replacing two acidic hydrogen atomsdibasic sodium phosphate, Na 2 HPO 4
Derived Formsdibasicity (ˌdaɪbeɪˈsɪsɪtɪ), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

dibasic in Medicine




Containing two replaceable hydrogen atoms.
Of or relating to salts or acids forming salts with two atoms of a univalent metal.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

dibasic in Science



Relating to an acid that contains two hydrogen atoms that can be replaced by metal ions. Sulfuric acid (H2SO4) is a dibasic acid. The hydrogens can be replaced by sodium and hydrogen to form sodium hydrogen sulfate (NaHSO4) or by two sodium atoms to form sodium sulfate (Na2SO4).
Relating to a compound that contains two basic monovalent groups or atoms.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.