The Collaborative International Dictionary of English v.0.48:

Indecency \In*de"cen*cy\, n.; pl. Indecencies. [L. indecentia
   unseemliness: cf. F. ind['e]cence.]
   [1913 Webster]
   1. The quality or state of being indecent; lack of decency,
      modesty, or good manners; obscenity.
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   2. That which is indecent; an indecent word or act; an
      offense against delicacy.
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            They who, by speech or writing, present to the ear
            or the eye of modesty any of the indecencies I
            allude to, are pests of society.      --Beattie.

   Syn: Indelicacy; indecorum; immodesty; impurity; obscenity.
        See Indecorum.
        [1913 Webster]