Wiktionary
prediluvian
a. before the Flood; antediluvian
Usage examples of "prediluvian".
Hebrew it might have been or something older than Hebrew, some incantation whereby the prediluvian magicians had controlled contentions among spirits or the language in which our father Adam named the beasts of the garden.
He holds his head high, and the blue-gray eye is like a pool at the bottom of a prediluvian pothole, remnant of a melted glacier.