diluvial \d-LU-vee-l \(noun)

1. Of or belonging to a deluge or flood, esp. to the Flood as recorded in Genesis

*2. (Geology) Applied to the theory which explained certain geological phenomena by reference to a general deluge, or to periods of catastrophic action of water

Example Sentence:

"Modern geology has almost banished such views as the excavation of a great valley by a single diluvial wave." (Charles Darwin, The Origin of the Species)