Source : Webster's Revised Unabridged Dictionary (1913)

Lymphadenitis \Lym`pha*de*ni"tis\, n. [NL. See {Lymph}, and
   {Adenitis}.] (Med.)
   Inflammation of the lymphatic glands; -- called also
   {lymphitis}.

Source : WordNet®

lymphadenitis
     n : inflammation of lymph nodes