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Buoyancy stands for
- a reduction in the weight of a body in a fluid,
- the static buoyancy of a submerged body,
- the dynamic lift of a body in a flow
- the rising of water from deeper layers, see buoyancy (oceanography)
- the relocation of grazing cattle to mountain pastures, see Almauftrieb
- living things floating in the water, see plankton
- ascending substances in the flotation separation process