acid - Dictionary definition and pronunciation - Yahoo! Education
Reference
Dictionary
Encyclopedia
Thesaurus
World Factbook
Spanish Dictionary
Anatomy
Conversion Calculator

Word of the Day
rationale
Definition: (noun) an underlying reason or explanation.
Petersons.com
Add Word of the Day to your personalized My Yahoo! page:
Add to My Yahoo! View RSS Feed
About My Yahoo! and RSS »
  

ac·id  audio  (sd) KEY 

NOUN:
  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.
ADJECTIVE:
  1. Chemistry
    1. Of, relating to, or containing an acid.
    2. Having a high concentration of acid.
    3. Having the characteristics of an acid.
    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.
ETYMOLOGY:
From Latin acidus, sour, from acre, to be sour; see ak- in Indo-European roots

OTHER FORMS:
acid·ly(Adverb), acid·ness(Noun)


 Visit our partner's site
Provided by Houghton Mifflin
logoeReference -- Download this interactive reference software to your desktop computer