| SPA | serum plate agglutination |
|---|---|
| SpaA | Surface protein antigen A |
| SPAMM | Spatial modulation of magnetization |
| SPAP | Systolic pulmonary artery pressure |
| SPAQ | Seasonal Pattern Assessment Questionnaire |
| SPARC | Secreted Protein Acidic and Rich in Cysteine |
| SPase | Signal peptidase |
| SPB | Solitary plasmacytoma of bone |
| SPB | Surfactant Protein-B |
| SPB | spindle pole body |