The Collaborative International Dictionary of English v.0.48:

Phagedena \Phag`e*de"na\, n. [L. phagedaena, Gr. fage`daina, fr.
   fagei^n to eat.] (Med.)
      (a) A canine appetite; bulimia. [Obs.]
      (b) Spreading, obstinate ulceration.
          [1913 Webster] Phagedenic