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Definition of Gastrointestinal

Gastrointestinal: Adjective referring collectively to the stomach and small and large intestines.

The commonly used abbreviation for gastrointestinal is GI. (Outside of medicine, GI can also stand for galvanized iron, general issue or government issue - as in GI Joe).

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=3555
Last Editorial Review: 10/9/2012

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