The Collaborative International Dictionary of English v.0.48:

ozena \o*ze"na\ ([-o]*z[=e]"n[.a]), n. [NL., fr. L. ozaena, Gr.
   'o`zaina, fr. 'o`zein to smell.] (Med.)
   A discharge of fetid matter from the nostril, particularly if
   associated with ulceration of the soft parts and disease of
   the bones of the nose.

WordNet (r) 3.0 (2006):

ozena
    n 1: a chronic disease of the nose characterized by a foul-
         smelling nasal discharge and atrophy of nasal structures
         [syn: ozena, ozaena]