tahketest osakestest koosnev sade, mis moodustub vedelike setitamisel, filtreerimisel, metallide (Cu, Zn jt) elektrolüütilisel rafineerimisel ja maakide märgrikastamisel, 1. a material of extremely fine particle size encountered in ore treatment; 2. a mixture of metals and some insoluble compounds that forms on the anode in electrolysis