[ dahy-bey-sik ]
/ daɪˈbeɪ sɪk /

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


di·ba·sic·i·ty [dahy-bey-sis-i-tee] /ˌdaɪ beɪˈsɪs ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dibasic

British Dictionary definitions for dibasic

/ (daɪˈbeɪsɪk) /


(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 forms of dibasic

dibasicity (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

Medicine definitions for dibasic

[ dī-bāsĭk ]


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.

Science definitions for dibasic

[ dī-bāsĭk ]

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.