- st. mary magdalen
- saul
- saul steinberg
- simon newcomb
- st. thomas
- simon the canaanite
- st. petersburg
- st. simon
- st. thomas and principe
- saint valentine's day
- sally out
- sockeye salmon
- sockeye
- salmon patch
- salmon
- salmon trout
- salvelinus namaycush
- salol warnish
- salmonellatyphimurium
- salmonberry
- syringe transmitted jaundice
- syringe hepatitis
- syringe applicator
- speculum
- sweetening
- sugar the pill
- syrup of squill
- systematisation
- systadial
- selma
- synchondrosis sternalis
- solar trap
- servosystem
- servomechanism
- synchronal
- surface_to_air missile system
- staginess
- staging
- ship_towed long_range acoustic detection system
- scafold protein
- sound transmission loss
- sprinkler irrigation
- system key
- system accounting
- system log
- systems analysis
- systems analysist
- standard of living
- spectra
- spectral transmit_ tance curve