| Abbreviation | Definition |
|---|---|
| SO | sulphur monoxide |
| SO/2 | Sulphur Dioxide |
| SOC | Synthetic Organic Compound |
| SOCB | School Of Chemistry and Biochemistry |
| SOCC | Synthetic Organic Chemistry Core |
| SOCI | Society Of Chemical Industry |
| SOCI | Society Of the Chemical Industry |
| SOD | SuperOxide Dismutase |
| SOF | Self Organization Factor |
| SOF | Soluble Organic Fraction |
| SOL | Statistic Operator Of Liquid |
| SOMO | Singly-Occupied Molecular Orbital |
| SP | Solubility Product |
| SP | Spontaneous Potential |
| SPADE | Stratospheric Photochemistry Aerosols and Dynamics Expedition |
| SPC | Single Pair Concentration |
| SPC | SphingosylPhosphorylCholine |
| SPCC | State Protocol for Chemical Cleanup |
| SPCI | South Pacific Chemical Industries |
| SPD | Suspended Particle Device |