| Abbreviations | Meaning |
 | SBR | Small Bowel Resection; Small Box Respirator; Spleen-to-body [weight] Ratio; Strict Bed Rest; Styrene-butadiene Rubber |
| BS | Bedside; Bowel Sound; Breath Sound |
| GJ | Gap Junction; Gastric Juice; Gastrojejunostomy |
| GE | Gastroesophageal |
| NG | N-G, Nasogastric |
| TGE | Transmissible Gastroenteritis |
| SIM | Specialized Intestinal Metaplasia |
| UGI | (see GI) Upper Gastrointestinal |
| GIF | Gastric Intrinsic Factor; Gonadotropin-inhibiting Factor; Graphic Interchange Format [imaging]; Growth Hormone-inhibiting Factor |
| CSB | Contaminated Small Bowel; Craniosynostosis, Boston Type |
| UGI | Upper Gastrointestinal [tract] |
| GE | Gastroemotional |
| GU | Gastric Ulcer |
| MNGIE | Myo-, Neuro-, Gastrointestinal Encephalopathy |
| BI | Bowel Impaction |
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