spac - spru
- split toggle
- split tubing
- split wind
- split-field colorimeter
- splitter
- splitter box
- splitter hopper
- splitting fracture
- splitting of dislocation
- spodumene
- spoil reclaiming
- spoiled
- spoiled casting
- sponge
- sponge iron
- sponge iron powder
- sponge metal
- sponge plating
- sponge-iron plant
- sponge-like decay
- sponge-like state
- spongeous mass
- sponging
- sponging agent
- spongious corrosion
- spongy coating
- spongy copper
- spongy lead
- spongy material
- spongy titanium
- spongy top
- spontaneous adsorption
- spontaneous annealing
- spontaneous combustion
- spontaneous cracking
- spontaneous decomposition
- spontaneous deformation
- spontaneous magnetization domain
- spontaneous recombination
- spontaneous recrystallization