archaism

from WordNet (r) 3.0 (2006)

archaism
    n 1: the use of an archaic expression [syn: {archaism},
         {archaicism}]

from The Collaborative International Dictionary of English v.0.48

Archaism \Ar"cha*ism\, n. [Gr. 'archai:smo`s, fr. 'archai^os
   ancient, fr. 'archh` beginning: cf. F. archa["i]sme. See
   {Arch}, a.]
   1. An ancient, antiquated, or old-fashioned, word,
      expression, or idiom; a word or form of speech no longer
      in common use.
      [1913 Webster]

   2. Antiquity of style or use; obsoleteness.
      [1913 Webster]

            A select vocabulary corresponding (in point of
            archaism and remoteness from ordinary use) to our
            Scriptural vocabulary.                --De Quincey.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

31 Moby Thesaurus words for "archaism":
      Pre-Raphaelitism, ancient manuscript, antiquarianism, antique,
      antiquity, archaeology, archaicism, artifact, cave painting,
      classicism, eolith, fossil, medievalism, mezzolith, microlith,
      neolith, obsolete, obsoletism, paleolith, petrification,
      petrified forest, petrified wood, petroglyph, plateaulith, relic,
      reliquiae, remains, ruin, ruins, survival, vestige