atomic

adj. of or pertaining to atoms; that employs nuclear enery; originating from destructive energy from the release of atomic energy (of weapons); infinitesimal

In chemistry and physics, an atom (Greek ἄτομος or átomos meaning "indivisible") is the smallest particle still characterizing a chemical element.An atom consists of a dense nucleus of positively-charged protons and electrically-neutral neutrons, surrounded by a much larger electron cloud consisting of negatively-charged electrons. An atom is electrically neutral if it has the same number of protons as electrons. The number of protons in an atom defines the chemical element to which it belongs, while the number of neutrons determines the isotope of the element.
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The name Atom applies to a pair of related standards. The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol (APP is the acronym, but it is referred to as 'AtomPub' for short) is a simple HTTP-based protocol for creating and updating Web resources. Web feeds allow software programs to check for updates published on a web site. To provide a web feed, a site owner may use specialized software (such as a content management system) that publishes a list (or "feed") of recent articles or content in a standardized, machine-readable format. The feed can then be downloaded by web sites that syndicate content from the feed, or by feed reader programs that allow Internet users to subscribe to feeds and view their content.
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Adjective
1. of or relating to or comprising atoms; "atomic structure"; "atomic hydrogen"
(pertainym) atom
2. (weapons) deriving destructive energy from the release of atomic energy; "nuclear war"; "nuclear weapons"; "atomic bombs"
(synonym) nuclear
(similar) thermonuclear
3. immeasurably small
(synonym) atomlike, minute
(similar) microscopic, microscopical, small

(a.)
Alt. of Atomical
  

<jargon> (From Greek "atomos", indivisible) Indivisible; cannot be split up.
For example, an instruction may be said to do several things "atomically", i.e. all the things are done immediately, and there is no chance of the instruction being half-completed or of another being interspersed. Used especially to convey that an operation cannot be interrupted.
An atomic data type has no internal structure visible to the program. It can be represented by a flat domain (all elements are equally defined). Machine integers and Booleans are two examples.
An atomic database transaction is one which is guaranteed to complete successfully or not at all. If an error prevents a partially-performed transaction from proceeding to completion, it must be "backed out" to prevent the database being left in an inconsistent state.
[Jargon File]
(2000-04-03)