Su`per*na"tant (?), a. [L. supernatanus, p.pr. of supernatare to swim above; super above + natare to swim.]
Swimming above; floating on the surface; as, oil supernatant on water.
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© Webster 1913.
Su`per*na"tant (?), n. Chem.
The liquid remaining after solids suspended in a liquid have been sedimented by gravity or by centrifugation. Contrasted with the solid sediment, or (in centrifugation) the pellet.
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© Webster 1913.