satu - sele
- saturated vapor
- saturation
- saturation period
- Saturn
- saver spare
- saver wheel
- saving tire
- saybolt viscometer
- SB
- SBR
- SBS
- SC
- scab corrosion
- scale
- scale free system
- scale rust
- scan
- scan button
- scan tool
- scanimet
- scanner
- scatter shield
- scavenge
- scavenger pump
- scavenging
- scavenging jet
- scavenging losses
- scavenging passage
- scavenging picture
- scavenging port
- scavenging pump
- scavenging system
- scavenging valve
- SCC
- schematic
- scheme
- Schneider
- Schnürle scavenging
- Schrader valve
- Scientific Research and Experimental Development Program
