See under Noah(def 1).
an ark shell, Arca noae.
Origin of Noah's Ark
First recorded in 1605–15
the patriarch who built a ship (Noah's Ark) in which he, his family, and animals of every species survived the Flood. Gen. 5–9.
a male given name: from a Hebrew word meaning “rest.”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Australian a shark
Word Origin for noah
from Australian rhyming slang Noah's Ark
Old Testament a Hebrew patriarch, who saved himself, his family, and specimens of each species of animal and bird from the Flood by building a ship (Noah's Ark) in which they all survived (Genesis 6–8)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
masc. proper name, from Hebrew Noah, literally "rest." Phrase Noah's ark attested from 1610s. The adjective Noachian, in reference to the flood legend, is from 1670s.
Online Etymology Dictionary, © 2010 Douglas Harper