noun, plural: suspensions
(1) (biochemistry) The state in which the particles of a substance are dispersed but not totally dissolved in a fluid; the substance in this state.
(2) (general) The act or condition of temporary stoppage; an interruption.
A suspension contains particles that are mixed by agitation and dispersed in the fluid. When allowed to settle, the particles can be seen at the bottom.
Some drugs are available as oral suspensions. Hence, these drugs need to be taken by first shaking the bottle containing the suspension.