1) Gi 
Pertaining or communicating with the stomach and intestine.
• (a.) Of or pertaining to the stomach and intestines; gastroenteric.
(gastro- + intestinal) pertaining to or communicating with the stomach and intestine, as a gastrointestinal fistula.
Refers to the stomach and intestines. Also called GI.
<anatomy> Pertaining to or communicating with the stomach and intestine, as a gastrointestinal fistula. ... (18 Nov 1997) ... 
(gas″tro-in-tes´tĭ-nәl) pertaining to the stomach and intestine.
Having to do with the digestive tract, which includes the mouth, esophagus, stomach and intestines.
Adjective referring collectively to the stomach and small and large intestines.
Adjective referring collectively to the stomach and small and large intestines.
having to do with the digestive system, especially the stomach and intestines.
Refers to the stomach and intestine.
Gas`tro·in·tes'ti·nal adjective [ Gastro- + -intestinal .] (Anat. & Med.) Of or pertaining to the stomach and intestines; gastroenteric. 
(GI) Type: Term Pronunciation: gas′trō-in-tes′tin-ăl Definitions: 1. Relating to the stomach and intestines. Synonyms: gastroenteric
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).
Adjective referring collectively to the stomach and small and large intestines.
Relating to the stomach and intestines.
[adj] - of or relating to the stomach and intestines
GI adjective of or relating to the stomach and intestines; `a gastrointestinal disorder`
relating to the digestive tract.
of or relating to the stomach and intestines