Noachian

• (UK) IPA^(key): /nəʊˈeɪkɪən/

From Noach (“variant of Noah”) +‎ -ian.

Noachian (not comparable)

1. Pertaining to Noah or his time. [from 17th c.]
   • 1977, K.M. Elizabeth Murray, Caught in the Web of Words, Oxford: Oxford University Press, page 47:

     At the next meeting he was back on a geological topic illustrated by maps, diagrams and specimens, and the following year he spoke on "The Noachian Deluge, universal with regard to man, but very restricted with regard to the earth"[.]

   • 2011, Steven Pinker, The Better Angels of Our Nature, Penguin, published 2012, page 13:

     The victims of the Noachian flood would add another 20 million or so to the total.

   • 2014, Elizabeth Kolbert, chapter 1, in The Sixth Extinction: An Unnatural History, Henry Holt and Company:

     At the time of my visit, EVACC was down to just one Rabbs' Frog, so the possibility of saving even a single, Noachian pair had obviously passed.

• • Noahian
  • Noahtic

• Noahide, Noahite

From Noachis +‎ -ian (after Etymology 1, above).

Noachian (not comparable)

1. Pertaining to the earliest Martian geological time period characterized by large craters. [from 20th c.]

Noachian (uncountable)

1. The Noachian geological period. [from 20th c.]

• Hesperian
• Amazonian