| SHLA | soluble human lymphocyte antigen |
|---|---|
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| SIL | soluble interleukin; speech interference level |
| SIRS | soluble immune response suppressor; Structured Interview of Reported Symptoms; systemic inflammatory... |
| SLA | left sacroanterior [fetal position] [Lat. sacrolaeva anterior]; single-cell liquid cytotoxic assay; ... |