Source : Webster's Revised Unabridged Dictionary (1913)

Idiocracy \Id`i*oc"ra*cy\, n.; pl. {Idiocrasies}. [Idio- + Gr. ?
   a mixture, fr. ? to mix: cf. F. idiocrasie.]
   Peculiarity of constitution; that temperament, or state of
   constitution, which is peculiar to a person; idiosyncrasy.