suspension

In chemistry, a suspension is a mixture where solid particles are dispersed in a fluid but are not dissolved. These particles hang in the fluid, like sand in water or sea spray in the air. Unlike true solutions, the particles in a suspension are larger than atoms or molecules and can be visible to the naked eye, though they are too small to be seen without magnification.12

Suspensions can be stabilized by adding a suspending agent, which helps keep the particles dispersed and prevents them from settling. If the dispersion medium is water, it's called a hydrosol, and if it's air, it's an aerosol. Colloids, which include suspensions, are crucial in both biological processes and industrial applications.342