Relating to or involving the stomach and intestines together; affecting the digestive system.
From gastro- (stomach) + intestinal (from Latin intestinus, meaning 'internal'). This term became standard medical terminology in the 20th century as a convenient way to describe the entire upper digestive tract.
You'll hear 'GI' all the time in medicine and on commercials—it's one of the few medical terms that has become truly everyday language because digestive issues are so universal!
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