The Collaborative International Dictionary of English v.0.48:

Phagedenic \Phag`e*den"ic\, Phagedenical \Phag`e*den"ic*al\, a.
   [L. phagedaenicus, Gr. fagedainiko`s: cf. F.
   phag['e]d['e]nique.] (Med.)
   Of, like, or pertaining to, phagedena; used in the treatment
   of phagedena; as, a phagedenic ulcer or medicine. -- n. A
   phagedenic medicine.
   [1913 Webster]