The Collaborative International Dictionary
Postdiluvial \Post`di*lu"vi*al\, Postdiluvian \Post`di*lu"vi*an\, a. [Pref. post- + diluvial, diluvian.] Being or happening after the flood in Noah's days.
Douglas Harper's Etymology Dictionary
a. After the Biblical Flood.
Usage examples of "postdiluvial".
Moreover, the kings of the first postdiluvial dynasty are represented as having ruled all told 24,150 years, three months, and three and one half days.