Di*lu"vi*um (?), 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.
⇒ The accumulation of matter by the ordinary operation of water is termed alluvium.
© Webster 1913.