flotation

also float·a·tion (flō-tāˈshən)

1. The act, process, or condition of floating. Also called flotage.
2. The act or an instance of launching or initiating, especially the floating of stocks or bonds or the financing of a business venture by floating stocks or bonds.
3. The process of separating different materials, especially minerals, by agitating a pulverized mixture of the materials with water, oil, and chemicals. Differential wetting of the suspended particles causes unwetted particles to be carried by air bubbles to the surface for collection.
4. The capability, especially of a vehicle tread or tire, to remain on top of a soft surface, such as sand, wet ground, or snow.