What is a type of suspension that does not settle out under normal conditions?
I think you are looking for the term
And a colloid is a mixture of particles of two or more substances that are finely dispersed in each other. Colloids can include gels, sols, and emulsions...and the particles cannot be separated by mechanical means such as filtration or by the action of a centrifuge.
A common example of a colloid is mayonnaise or hollandaise sauce (yum). You should consult your text for further examples and explanation.