acid

adj. of or pertaining to an acid (Chemistry); having a sour taste; sarcastic, acerbic

n. any of a group of sour-tasting substances that dissolve in water and form salts when combined with bases (Chemistry); substance having a sour taste; acerbity, sarcasm; LSD (Slang)

In computer science, ACID (Atomicity, Consistency, Isolation, Durability) is a set of properties that guarantee that database transactions are processed reliably. In the context of databases, a single logical operation on the data is called a transaction.An example of a transaction is a transfer of funds from one account to another, even though it might consist of multiple individual operations (such as debiting one account and crediting another).
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An acid (often represented by the generic formula HA [H+A-]) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a pH less than 7.0. That approximates the modern definition of Johannes Nicolaus Brønsted and Martin Lowry, who independently defined an acid as a compound which donates a hydrogen ion (H+) to another compound (called a base). Common examples include acetic acid (in vinegar) and sulfuric acid (used in car batteries). Acid/base systems are different from redox reactions in that there is no change in oxidation state. Generally, acids have the following properties:Taste:Acids often taste sourTouch: Strong or concentrated acids often produce a stinging feeling on mucous membranesReactivity: Strong acids react aggressively with or corrode many metals Electrical conductivity: Acids, while not usually ionic compounds, are electrolytesAcids turn moist blue litmus paper red
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ACiD Productions (ACiD) is an underground digital art group. Founded in 1990, the group originally specialized in ANSI artwork for BBSes. More recently, they have extended their reach into other graphical media and computer software development.
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n. acid, chemical substance which neutralizes alkalis; hallucinogenic drug LSD (Slang)

n. substance having a sour taste; acid, any of a group of sour-tasting substances that dissolve in water and form salts when combined with bases

(n.)
One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids.
  

(n.)
A sour substance.
  

(a.)
Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour-tempered.
  

(a.)
Of or pertaining to an acid; as, acid reaction.