| Abbreviation | Definition |
|---|---|
| IDT | Intrinsic Deflection Time |
| IE | Immunity Enhancement |
| IE | Infective Endocarditis |
| IE | Inner ear |
| IED | Intermittent Explosive Disorder |
| IEL | Internal Elastic Lamina |
| IEL | Intra-Epithelial Lymphocytes |
| IELT | intravaginal ejaculation latency time |
| IEM | In Ear Monitor |
| IEP | ImmunoElectroPhoresis |
| IER | Immediate Eye Relief |
| IET | Integrated Energy Therapy |
| IFR | Inspiratory Flow Rate |
| IFS | Irradiated Food Syndrome |
| IFSF | Index of Female Sexual Function |
| IG | Internal Globulin |
| IGA | ImmunoGlobulins A |
| IGD | immunoglobulins D |
| IGE | ImmunoGlobin E |
| IGE | immunoglobins E |