principle of liquid displacement
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|Noun||1.||principle of liquid displacement - (hydrostatics) the volume of a body immersed in a fluid is equal to the volume of the displaced fluid|
principle, rule - a rule or law concerning a natural phenomenon or the function of a complex system; "the principle of the conservation of mass"; "the principle of jet propulsion"; "the right-hand rule for inductive fields"
hydrostatics - study of the mechanical properties of fluids that are not in motion