Colloid

(link): “A homogeneous, noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.”

A colloid has two phases – the continuous or external phase, which the phase in which things are dispersed, and the internal, discontinuous, discrete, or dispersed phase in which the particles are dispersed. What does that sound like? An emulsion! 

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