Gastrointestinal
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Of or pertaining to the stomach and intestines;
gastroenteric.Gastrointestinal meaning & definition 1 of Gastrointestinal.
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Relating to the stomach and the intestines.
Gastrointestinal meaning & definition 2 of Gastrointestinal.
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in or relating to both the stomach and the intestine (= the long tube that food passes through after the stomach) :
Gastrointestinal meaning & definition 3 of Gastrointestinal.