internal medicine
noun /ɪnˌtɜːnl ˈmedsn/, /ɪnˌtɜːnl ˈmedɪsn/
/ɪnˌtɜːrnl ˈmedɪsn/
[uncountable] (North American English)- the branch of medicine concerned with the treatment of diseases without doing medical operations
- He trained in internal medicine at Bellevue Hospital.