elutriation

noun
elu·​tri·​a·​tion | \ ē-ˌlü-trē-ˈā-shən How to pronounce elutriation (audio) \

Medical Definition of elutriation

1 : the removal of substances from a mixture by washing and decanting
2 : the separation of finer lighter particles from coarser heavier particles in a mixture by means of a usually slow upward stream of fluid so that the lighter particles are carried upward

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