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[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, Na 2 HPO 4 .
Origin of dibasic
First recorded in 1865-70; di-1 + basic
Related forms
[dahy-bey-sis-i-tee] /ˌdaɪ beɪˈsɪs ɪ ti/ (Show IPA),
noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for dibasic


(of an acid, such as sulphuric acid, H2SO4) containing two acidic hydrogen atoms Compare diacidic
(of a salt) derived by replacing two acidic hydrogen atoms: dibasic sodium phosphate, Na2HPO4
Derived Forms
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
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dibasic in Medicine

dibasic di·ba·sic (dī-bā'sĭk)

  1. Containing two replaceable hydrogen atoms.

  2. Or 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.
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dibasic in Science
  1. 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).

  2. Relating to a compound that contains two basic monovalent groups or atoms.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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