n.; pl. E. Diluviums L. Diluvia [ L. diluvium. See Dilute, Deluge. ] (Geol.) A deposit of superficial loam, sand, gravel, stones, etc., caused by former action of flowing waters, or the melting of glacial ice. [ 1913 Webster ]
☞ The accumulation of matter by the ordinary operation of water is termed alluvium. [ 1913 Webster ]