| Abbreviation | Definition |
|---|---|
| LRSP(CBER) | Laboratory of Respiratory and Special Pathogens (CBER) |
| LS | Labelling Standard |
| LS | Library Staff |
| LS/LS | Life Supporting/Life Sustaining |
| LSD | Lysergic acid diethylamide |
| LSHLC | Lipid-Soluble Heat-Labile Chemical |
| LSHSC | Lipid-Soluble Heat-Stable Chemical |
| LST | LiSTing number of a device |
| LTE | Long-Term Evaluation |
| LTSS | long-term services and supports |
| LUACRG | Lung and Upper Aerodigestive Cancer Research Group |
| LVBD(CBER) | Laboratory of Vector-Borne Diseases (CBER) |
| LVCH | Local VouCHer |
| LVP | Large-Volume Parenteral |
| LWC | Lead Wire or patient Cable |
| LWOP | Leave WithOut Pay |
| M2 | ICH M2 Expert Working Group (EWG) [electronic standards for transmission of regulatory information] |
| M204 | Model 204 DataBase Management System |
| M2EWG | ICH M2 Expert Working Group |
| M4 | ICH M4 Expert Working Group (EWG) [focusing on Common Technical Documents for sections of the NDA] |