Source : Webster's Revised Unabridged Dictionary (1913)

Idiopathy \Id`i*op"a*thy\, n.; pl. {Idiopathies}. [Gr. ?; ?
   proper, peculiar + ?, ?, to suffer: cf. F. idiopathie.]
   1. A peculiar, or individual, characteristic or affection.

            All men are so full of their own fancies and
            idiopathies, that they scarce have the civility to
            interchange any words with a stranger. --Dr. H.
                                                  More.

   2. (Med.) A morbid state or condition not preceded or
      occasioned by any other disease; a primary disease.

Source : WordNet®

idiopathy
     n : any disease arising from internal dysfunctions of unknown
         cause [syn: {idiopathic disease}, {idiopathic disorder}]