- Stirling number
- stochasticity
- Stockbridge damper
- stoichiometric
- stop number
- stopcock
- stopper circuit
- storage cabinet
- storage compartment
- storage refrigerator
- storage ring
- still air
- stilling
- stirring effect
- STM-n
- stoichiometry
- stoke
- stokes
- stop band
- storage capacity
- storage environment
- storage heater
- storage quality
- storage stock
- storage tray
- stored refrigeration
- stoving
- stowing density
- straggling
- straight-freezing
- straightforward
- strain ellipsoid
- strain gauge
- strain insulator
- stranded wire
- strange attractor
- strange particle
- strangeness
- strapping
- stratification
- stratified atmosphere
- stratified flow
- stratified insulant
- stiffness factor
- stigmatism
- stimulated emission
- stochastic signal
- stoichiometric formular
- Stokes relation
- stoplight
- stopping
- storage case
- storage container
- storage depreciation
- storage freezer
- storage heating
- storage room
- storage stank
- storage technology
- stratopause
- stratospheric
- stray current
- stray wave
- stream tube
- streaming
- streaming current
- streaming potential
- streamline shape
- streamlined body
- strength test
- strengthen
- strengthening
- stress ellipsoid
- stress relaxation
- striae
- strike bath
- stripping
- stroboscopic
- stroke
- strong electrolyte
- stub
- stub tuner
- study
- sub lattice
- sub-atomic
- subcooled mixture
- subcooling section
- subcritical speed
- sublimation curve
- submersible pump
- submicroscopic
- subscriber
- subsonic flow
- substate
- subtolerance
- subtransient reactance
- subunit
- subzero accommodation
- subzero quenching
- sucking action