This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of, relating to, or produced by a flood.

adj. Relating to or produced by a flood or deluge.

adj. Pertaining to Noah's Flood.

adj. Of or pertaining to a flood or deluge, esp. to the great deluge in the days of Noah; diluvian.

adj. Effected or produced by a flood or deluge of water; -- said of coarse and imperfectly stratified deposits along ancient or existing water courses. Similar unstratified deposits were formed by the agency of ice. The time of deposition has been called the Diluvian epoch.

Pertaining to a flood or deluge, especially to the deluge recorded in Genesis.

In geology, related to or consisting of diluvium.

adj. of or connected with a deluge

"It has even been supposed that in diluvial deposits the presence of ‘dendrites’ might be regarded as affording a certain mark of distinction between bones mixed with the diluvium at a somewhat later period and the true diluvial relics, to which alone it was supposed that these deposits were confined."

antediluvian    deluge   

diluvian   

auriferous    lower-lying    checkable    recriminatory    Pleistocene    fluviatile    undrained    new-formed    stratigraphical    uniformitarian