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[uh-sid-i-tee] /əˈsɪd ɪ ti/
the quality or state of being acid.
sourness; tartness.
excessive acid quality, as of the gastric juice.
Origin of acidity
1610-20; < Late Latin aciditās. See acid, -ity
Related forms
nonacidity, noun
overacidity, noun
preacidity, noun
superacidity, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for acidity
  • To prevent acidity of the stomach, add from one to two teaspoonfuls of lime water to each half-pint of milk.
  • The acidity is so strong that it kills fish and aquatic vegetation.
  • Buttermilk's slight acidity helps activate baking soda and make bread rise.
  • As long as this increase goes on the longer it will take to reach a new equilibrium heat and acidity balance.
  • Using half cake flour, with its acidity and low protein content, reduces browning.
  • The seedpods of the plant have the texture of a fine green bean and burst with acidity.
  • Meat creates acidity and contribute to many diseases.
  • Extreme acidity of the blood could do it, but his lab tests were fine.
  • It turned out to be an ion channel that opens not only when capsaicin binds to it but also in response to heat and acidity.
  • Perfect balance of florals and peaches, richness and acidity.
British Dictionary definitions for acidity


noun (pl) -ties
the quality or state of being acid
the amount of acid present in a solution, often expressed in terms of pH
another name for hyperacidity
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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Word Origin and History for acidity

1610s, from French acidité (26c.) or directly from Latin aciditatem (nominative aciditas), noun of quality from Latin acidus (see acid (adj.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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acidity in Medicine

acidity a·cid·i·ty (ə-sĭd'ĭ-tē)
The state, quality, or degree of being acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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