| KI | karyopyknotic index; Kronig's isthmus |
|---|---|
| KI(?) | Potassium Iodide; 옥화칼륨 |
| KIA | Kligler iron agar |
| KIC | ketoisocaproate; keto isocaproic acid |
| KICB | killed intracellular bacteria |
| KID | keratitis, ichthyosis, and deafness [syndrome] |
| KIDS | Kansas Infant Development Screen |
| kilo | kilogram |
| KIMSA | Kirsten murine sarcoma |
| KIMSV, Ki-MSV | Kirsten murine sarcoma virus |