Definition of internal medicine in English:

internal medicine

Pronunciation /ɪnˌtəːnl ˈmɛd(ɪ)s(ɪ)n/

noun

Medicine
  • 1A medication administered or taken internally; †treatment using such medications (obsolete).

  • 2US A branch of medical practice dealing with the diagnosis and non-surgical treatment of diseases of the internal organs, especially in adults.

Origin

Mid 17th century; earliest use found in Certaine Statvtes Iustices & Officers of Peace. From internal + medicine.