| Abbreviations | Meaning |
 | IO | Incisal Opening; Inferior Oblique; Inferior Olive; Internal Os; Interorbital; Intestinal Obstruction; Intraocular; Intraoperative; Intra-osseous |
| PGE | Platelet Granule Exract; Posterior Gastroenterostomy |
| SBFT | Small Bowel Follow Through Series |
| HGM | Hog Gastric Mucosa; Human Gene Mapping; Human Glucose Monitoring |
| MNGIE | Myo-, Neuro-, Gastrointestinal Encephalopathy |
| GIS | Gas In Stomach; Gastrointestinal Series; Geographic Information System; Guaranteed Income Supplement |
| SLUDGE | Salivation, Lacrimation, Urination, Defecation, Gastrointestinal Upset, Emesis |
| LBM | Last Bowel Movement; Lean Body Mass; Loose Bowel Movement; Lung Basement Membrane |
| FEGG | Fast Electrogastrogram |
| UGIB | Upper Gastrointestinal Bleeding |
| DGE | Delayed Gastric Emptying; Diglycidyl Ether |
| GA | Gastric Antrum |
| GICA | Gastrointestinal Cancer |
| IBB | Intestinal Brush Border |
| GCA | Gastric Cancer Area; Giant Cell Arteritis |
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