[‚sed·ə·mən′tā·shən və‚läs·əd·ē] (analytical chemistry) The rate of movement of the liquid-sediment boundary in the sample holder during centrifugation; used in molecular-weight determinations.
sedimentation velocity
sed·i·men·ta·tion ve·loc·i·ty
the rate of movement of a substance, typically a macromolecule, in centrifugation; these centrifugation studies provide data on the structure of the macromolecule.