<computer programming> A mnemonic for the properties a transaction should have to satisfy the Object Management Group Transaction Service specifications. A transaction should be Atomic, its result should be Consistent, Isolated (independent of other transactions) and Durable (its effect should be permanent).

The Transaction Service specifications which part of the Object Services, an adjunct to the CORBA specifications.

(01 Mar 1997)

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<chemistry> A fundamental category of many compounds whose water-based solutions have a sour taste, turn blue litmus paper red and can combine with metals to form salts.

They are chemical compounds which yield hydrogen ions or protons when dissolved in water, whose hydrogen can be replaced by metals or basic radicals, or which react with bases to form salts and water (neutralization).

An extension of the term includes substances dissolved in media other than water. Specific types of acids include:

Arrhenius acid: any chemical that increases the number of free hydrogen ions (H+) when added to a water-based solution. The more free hydrogens produced, the stronger the acid.

Bronsted or Bronsted-Lowry acid: any chemical that acts as a proton donor in a chemical reaction.

Lewis acid: any chemical that accepts two electrons to form a covalent bond during a chemical reaction.

(13 Nov 1997)

acicular, aciculate, aciculite, ACID < Prev | Next > acid agglutination, acidaminuria

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