mastoiditis

from WordNet (r) 3.0 (2006)

mastoiditis
    n 1: inflammation of the mastoid

from The Collaborative International Dictionary of English v.0.48

Mastoiditis \Mas`toid*i*tis\, n. [NL. See {Mastoid}, and
   {-itis}.] (Med.)
   Inflammation in the mastoid process of the temporal bone.
   [Webster 1913 Suppl.]