| Abbreviation | Definition |
|---|---|
| JPSL | Joint Protein Structure Laboratory |
| JRL | Joint Robotics Laboratory |
| K | Potassium |
| KAPL | Kaplknolls Atomic Power Laboratory |
| KC | Kidney Cell |
| KCDC | Korean Center for Disease Control and Prevention |
| KCL | Korea Conformity Laboratories |
| KCL | Potassium Chloride |
| Kd | Dissociation Constant |
| KDS | Kinematic Diagnosis System |
| KDW | King Doctor Wisdom |
| KEMAR | Knowles Electronics Manikin for Acoustics Research |
| kg/bw | kilograms per body weight |
| KIMS | Kabi International Metabolic Study |
| KLL | Kinneret Limnological Laboratory |
| KOH | Potassium Hydroxide |
| KOL | Key Opinion Leader |
| KP | Keratitic Precipitate |
| KPCOFGS | Kingdom, Phylum, Class, Order, Family, Genus, and Species |
| KRL | Kahota Research Labortories |