| Abbreviation | Definition |
|---|---|
| LOCA | Longitudinal Chromatic Aberration (when capitalized as "LoCA") |
| LOCA | Loss Of Coolant Accident |
| LOMO | Lowest Occupied Molecular Orbital |
| LOPI | Loss Of Piping Integrity |
| LOQ | Limit of quantitation |
| LOT | Laser-Optic Technology |
| LOT | Loss Of Tension |
| LP | Linear Polarization |
| LPA | Long Path Absorption |
| LPBS | Laboratory of the Physics of Biological Systems |
| LPC | LHC Physics Center |
| LPCC | LHC Physics Centre at CERN |
| LPD | Low Pressure Discharge |
| LPE | Little Physics Engine |
| LPI | Light Particle Irreducibility |
| LPMS | Laser Power Measurement System |
| LPON | Learning Physics as One Nation |
| LPOP | Little Pairs Out of Position |
| LPP | Lawrenceville Plasma Physics |
| LPPC | Laboratory for Particle Physics and Cosmology |