The Collaborative International Dictionary of English v.0.48:

acrisia \a*cris"i*a\ ([.a]*kr[i^]s"[i^]*[.a]), acrisy \ac"ri*sy\
   ([a^]k"r[i^]*s[y^]), n. [LL. acrisia, Gr. 'akrisi`a; 'a priv.
   + kri`nein to separate, to decide.]
   1. Inability to judge.
      [1913 Webster]

   2. (Med.) Undecided character of a disease. [Obs.]
      [1913 Webster]