antediluvian
adjective
- 1
so extremely old as seeming to belong to an earlier period
a ramshackle antediluvian tenement
antediluvian ideas
- 2
of or relating to the period before the biblical flood
antediluvian man
noun
- 1
a very old person
- 2
any of the early patriarchs who lived prior to the Noachian deluge
Also useful for “antediluvian”:Scrabble— High-value letters — see what it scores