(n.) The act or process of filtering; the mechanical separation of a liquid from the undissolved particles floating in it.

bolting clarification colature destructive distillation distillation edulcoration effusion elution elutriation essentialization excretion exfiltration extraction extravasation exudation filtering leaching lixiviation ooze oozing percolating percolation purification refinement riddling screening seep seepage separation sieving sifting spiritualization straining sublimation transudation weep weeping winnowing