| ICN | intensive care nursery; International Council of Nurses |
|---|---|
| ICNa | intracellular concentration of sodium |
| ICNB | International Committee on Nomenclature of Bacteria |
| ICNC | intracerebral nuclear cell |
| ICNND | Interdepartmental Committee on Nutrition in National Defense |
| ICNP | International Classification of Nursing Practice |
| ICNV | International Committee on Nomenclature of Viruses |