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diacid

[dahy-as-id] /daɪˈæs ɪd/
adjective, Chemistry
1.
capable of combining with two molecules of a monobasic acid.
2.
(of an acid or a salt) having two replaceable hydrogen atoms.
Origin
1865-1870
1865-70; di-1 + acid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for diacid

diacid

/daɪˈæsɪd/
adjective
1.
another word for diacidic
2.
(of a salt or acid) containing two acidic hydrogen atoms: NaH2PO4is a diacid salt of phosphoric acid
noun
3.
an acid or salt that contains two acidic hydrogen atoms
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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10
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