| Abbreviations | Meaning |
 | PEG | Percutaneous Endoscopic Gastrostomy |
| GR | Gastric Resection; Great, Greater; Gross, Grossly; Group |
| GE | Gastric Empyting |
| GII | Gastrointestinal Infection |
| IO | Incisal Opening; Inferior Oblique; Inferior Olive; Internal Os; Interorbital; Intestinal Obstruction; Intraocular; Intraoperative; Intra-osseous |
| ACG | American College Of Gastroenterology |
| FEGG | Fast Electrogastrogram |
| FGDS | Fibrogastroduodenoscopy |
| GIS | Gas In Stomach; Gastrointestinal Series; Geographic Information System; Guaranteed Income Supplement |
| PGS | Postsurgical Gastroparesis Syndrome |
| HGM | Hog Gastric Mucosa; Human Gene Mapping; Human Glucose Monitoring |
| GO | Gastro-[o]esophageal; Geroderma Osteodysplastica; Glutamic Oxylacetic [acid]; Gonorrhea; Glucose Oxidase |
| GIT | Gastrointestinal Tract |
| MMIH | Megacystis-microcolon-intestinal Hypoperistalsis [syndrome] |
| BM | Bowel Movement |
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