Source : Webster's Revised Unabridged Dictionary (1913)

Poenology \P[oe]*nol"o*gy\ (p[-e]*n[o^]l"[-o]*j[y^]), n.
   See {Penology}.

Source : WordNet®

poenology
     n : the branch of criminology concerned with prison management
         and prisoner rehabilitation [syn: {penology}]