Dictionary.com
Thesaurus.com

serositis

American  
[seer-oh-sahy-tis, -zahy-] / ˌsɪər oʊˈsaɪ tɪs, -ˈzaɪ- /

noun

Pathology.
  1. inflammation of a serous membrane.


Etymology

Origin of serositis

< New Latin serōsītis; serosa, -itis