| Abbreviation | Definition |
|---|---|
| IBFW | Incidence of the reflected Beam from the Front Wall |
| IBIS | Ion Beam Information System |
| IBPT | Institute for Beam Physics and Technology |
| IBPT | International Building Physics Toolbox |
| IC | Indirect Calorimetry |
| IC | Influence Curve |
| IC | Initial Condition |
| IC | Internal Combustion |
| IC | Ion-exchange chromatography |
| ICAM | Institute for Complex Adaptive Matter |
| ICBM | Iogen Configuration Building Module |
| ICBP | International Conference on Biological Physics |
| ICE | Internal Combustion Engine |
| ICM | Internal Coordinate Mechanics |
| ICMP | Institute of Condensed Matter Physics |
| ICMP | International Conference On Medical Physics |
| ICNIRP | International Commission on Non-Ionizing Radiation Protection |
| ICP | Injector Control Pressure |
| ICP-AES | Inductively coupled plasma - atomic emission spectrometry |
| ICPE | International Commission on Physics Education |