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internal medicine

American

noun

the branch of medicine dealing with the diagnosis and nonsurgical treatment of diseases, especially of internal organ systems.

internal medicine British

noun

the branch of medical science concerned with the diagnosis and nonsurgical treatment of disorders of the internal structures of the body

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

internal medicine Scientific

The branch of medicine that deals with the diagnosis and nonsurgical treatment of diseases in adults.

Etymology

Origin of internal medicine

First recorded in 1900–05

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Dr Satish Koul, principal director and unit head of internal medicine at Fortis Hospital Gurgaon, says hospitals routinely see cases of dehydration, low blood pressure, kidney stress and heat exhaustion during extended heatwaves.

From BBC • May 28, 2026

But it’s attracting practitioners from internal medicine to endocrinologists.

From Barron's • May 21, 2026

Products may also be contaminated, notes Dr. Shaila Pai-Verma, an internal medicine doctor at a concierge practice in Chicago.

From The Wall Street Journal • Apr. 20, 2026

Cultural and linguistic barriers faced by her family motivated her to pursue internal medicine.

From Los Angeles Times • Apr. 28, 2025

The first thing the next morning, even before I had breakfast, I was visited by an older doctor who was head of internal medicine at the hospital.

From "Long Walk to Freedom" by Nelson Mandela

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023