internal medicine
From Longman Dictionary of Contemporary EnglishRelated topics: Hospitalinternal medicineinˌternal ˈmedicine noun [uncountable] American English MHa type of medical work in which doctors treat illnesses that do not need operationsExamples from the Corpusinternal medicine• Physicians trained in internal medicine are attached and function as consultants.• Smith has been practicing internal medicine in Mesa since 1976.