Colloid

A colloid is a type of mixture where tiny particles of one substance are evenly dispersed throughout another substance. These particles, which can be solids, liquids, or gases, are larger than those in a solution but smaller than those in a suspension. The particle size in a colloid typically ranges from about 1 nanometer to 1 micrometer. Colloids do not settle out over time, unlike suspensions, where larger particles can eventually settle to the bottom.