mas·ti·tis
noun/mæˈstaɪtɪs/
/mæˈstaɪtɪs/
[uncountable] (medical)- painful swelling (= the condition of being larger or rounder than normal) of the breast or udder usually because of infection
乳腺炎 Word Originmid 19th cent.: from Greek mastos ‘breast’ + -itis.