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domain, n.
  1. (connected open set) svæði
    = region 1
  2. (in algebra) heilbaugur
    = domain of integrity, entire ring, integral domain, integral ring
  3. (of a correspondence or relation) óðal
    = actual domain, left domain
    -> domain carrier 1
  4. (of a mapping) formengi, frámengi, skilgreiningarmengi, óðal
    = argument domain, domain of definition, range of arguments, set of definition, source 2, source set
    -> index set, interval of definition
  5. (of a morphism) forhlutur, fráhlutur, óðal
    = domain carrier 2, domain object, source 3