In chemistry, a suspension is a mixture of two or more components. In a suspension, very small pieces of solid are mixed in a liquid but do not dissolve.  If left still, the solid pieces will separate from the liquid and either fall to the bottom or rise to the top. Sand in water and flour in water are examples of suspensions. Suspensions may separate quickly or stay suspended for a long time, depending on what they contain.
- "Suspension". Merriam-Webster dictionary. Retrieved 2011-04-19.