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 (dĭ-lo͞o′vē-əl) also di·lu·vi·an (-ən)
Of, relating to, or produced by a flood.

[Late Latin dīluviālis, from Latin dīluvium, flood, from dīluere, to wash away; see dilute.]
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Adj.1.diluvian - of or connected with a deluge
References in classic literature ?
William Gilpin, who is so admirable in all that relates to landscapes, and usually so correct, standing at the head of Loch Fyne, in Scotland, which he describes as "a bay of salt water, sixty or seventy fathoms deep, four miles in breadth," and about fifty miles long, surrounded by mountains, observes, "If we could have seen it immediately after the diluvian crash, or whatever convulsion of nature occasioned it, before the waters gushed in, what a horrid chasm must it have appeared!
The state must show enough gumption to reform those anti diluvian Madrassahs and their anachronistic syllabi that limit the professional choices of young students turning them into a readily available cannon fodder for militant cause.
And indeed, both the celestial and diluvian imagery is appropriate.