Aerotitis: Middle ear problems due to changing atmospheric pressures, as when a plane descends to land. The problems include ear pain, ringing, diminished hearing and, sometimes, dizziness. The word aerotitis (pronounced aer-o-tit-is) is compounded from aer- + otitis meaning inflammation of the ear. Alternate terms for aerotitis: aerotitis media, barotitis, barotitis media, otic barotrauma.