post-diluvian
/ˌpəʊs(t)dʌɪˈl(j)uːvɪən/ /ˌpəʊs(t)dɪˈl(j)uːvɪən/adjective
Existing, happening, or living, after the Flood described in the book of Genesis, or (later) after a widespread flood as described in other mythological traditions.
noun
A person living in the biblical period after the time of the Flood; anyone living at any period after the Flood.
Origin
Late 17th century; earliest use found in Thomas Lawson (bap. 1630, d. 1691), Quaker minister and botanist. From post- + classical Latin dīluvium flood, deluge + -an.