| Acronym | Definition |
|---|
| IEIS➣Integrated Earth Information Server |
| IEIS➣Institute for European Intelligence and Security (Brussels, Belgium) |
| IEIS➣Institute for European and International Studies (Luxembourg) |
| IEIS➣Institute for Environmental and Industrial Science (Texas State University) |
| IEIS➣Indian Experiment of Infarct Survival (medical study) |
| IEIS➣Idiopathic Environmental Intolarence Syndrome |
| IEIS➣Inductors of Endogenous Interferon Synthesis |
| IEIS➣Immediate Endoscopic Injection Sclerosis (gastroenterology) |