| Abbreviation | Definition |
|---|---|
| IWL | Insensible Water Loss |
| JAC | Jackson Arthritis Center |
| JACP | J Assoc Chest Physicians |
| JAK | Janus Activated Kinase |
| JAK | Janus kinase |
| JAMA | Journal of the American Medical Association |
| JAPA | Jordanian American Physicians Association |
| JAS | Joint Activation System |
| JC | The Jang Chin method |
| JCHC | Joint Commission on Hospital Accreditation |
| JCJ | Joint Controlled Joints |
| JCSW | Joint Counts for SWelling |
| JCT | Junction |
| JDD | Juvenile Discogenic Disease |
| JDM | Juvenile DermatoMyositis |
| JDMS | Juvenile DermatoMyoSitis |
| JEV | Japanese Encephalitis Virus |
| JFP | Journal of Family Practice |
| JGA | JuxtaGlomerular Apparatus |
| JGP | Journal of General Physiology |