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3 dictionary results for: acids
American Heritage Dictionary - Cite This Source - Share This
ac·id       (ās'ĭd)  Pronunciation Key 
n.  
  1. Chemistry
    1. Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.
    2. A substance that yields hydrogen ions when dissolved in water.
    3. A substance that can act as a proton donor.
    4. A substance that can accept a pair of electrons to form a covalent bond.
  2. A substance having a sour taste.
  3. The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.
  4. Slang See LSD1.

adj.  
  1. Chemistry
    1. Of, relating to, or containing an acid.
    2. Having a high concentration of acid.
    3. Having the characteristics of an acid.
    4. Having a pH of less than 7.
    5. Having a relatively high concentration of hydrogen ions.
    1. Having a pH of less than 7.
    2. Having a relatively high concentration of hydrogen ions.
  3. Geology Containing a large proportion of silica: acid rocks.
  4. Having a sour taste. See Synonyms at sour.
  5. Biting, sarcastic, or scornful: an acid wit; an acid tone of voice.


[From Latin acidus, sour, from acēre, to be sour; see ak- in Indo-European roots.]

ac'id·ly adv., ac'id·ness n.
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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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The American Heritage Science Dictionary - Cite This Source - Share This
acid       (ās'ĭd)  Pronunciation Key 
Any of a class of compounds that form hydrogen ions when dissolved in water, and whose aqueous solutions react with bases and certain metals to form salts. Acids turn blue litmus paper red and have a pH of less than 7. Their aqueous solutions have a sour taste. Compare base.

acidic adjective
The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
CITE THIS SOURCE|PRINT
American Heritage Abbreviations Dictionary 3rd Edition - Cite This Source - Share This
ACIDS
American College of Integrated Delivery Systems

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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