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Definition of: colloid system
Chem.
Any aggregate of substances exhibiting the properties of a colloid, as sols, gels, emulsions, etc. Eight of these systems are known, occurring in solid, liquid, and gaseous forms, each identified in terms of the relationship existing between the disperse phase and the dispersion medium. See table below.
COLLOID SYSTEMS
| Components | Term | Example |
| Solid in solid | solid sol | alloys, paper |
| Solid in liquid | suspension | paints |
| Solid in gas | smoke | iodine vapor |
| Liquid in solid | gel | celluloid, glue, gelatin |
| Liquid in liquid | emulsion | milk, blood |
| Liquid in gas | fog | clouds, steam |
| Gas in solid | solid foam | pumice, rubber |
| Gas in liquid | foam | lather, froth |
| Gas in gas | (No example known) |
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