Colloids - Definition

•  A colloidal system is dispersion wherein dispersed particles (internal phase) distributed uniformly in a dispersion medium (external phase).

• The word colloid comes from a Greek word kolla', which means glue thus colloidal particles are glue like substances.

• Colloidal system are defined as those polyphasic system.

• Dimension of the dispersed phase measures between 10-100 A to a few micrometers.

• Colloids can be made settle by the process of centrifugation.