IPA: /stəˈmætɪtɪs/
KK: /stəˈmætɪtɪs/
A condition characterized by inflammation of the mucous membranes in the mouth.
The doctor diagnosed her with stomatitis after she complained of pain and swelling in her mouth.
Stomatitis is formed from "stoma" (from Greek "στόμα", meaning mouth) and "-itis" (from Greek "itis", meaning inflammation). The word refers to the inflammation of the mouth.
Think of 'stoma' meaning mouth and '-itis' indicating inflammation — so stomatitis is the inflammation of the mouth.