| Abbreviation | Definition |
|---|---|
| SPA | Single Pole Approximations |
| SPASER | stimulated emission of radiation |
| SPC-E | simple point charge extended |
| SPD | Solar Physics Division |
| SPDF | Space Physics Data Facility |
| SPE | Solid Phase Extraction |
| SPEAR | Stanford Positron Electron Accelerating Ring |
| SPECT | Single-Photon Emission Computed Tomography |
| SPH | Smoothed Particle Hydrodynamics |
| SPL | Square Pulsed Light |
| SPM | Scanning Probe Microscope |
| SPM | Self-Phase Modulation |
| SPM | Spectrophotometry Measurement |
| SPP(s) | surface plasmon polariton(s) |
| SPPG | Space Plasma Physics Group |
| SPPL | Stanford Plasma Physics Lab |
| SPPs | surface plasmon polaritons |
| SPPT | Symposium on Plasma Physics and Technology |
| SPR | Surface Plasmon Resonance |
| SPT | Supporting Physics Teaching |