The Collaborative International Dictionary of English v.0.48:
Noah's ark \No"ah's ark\, prop. n.
The ship built by Noah according to God's command, as related
in the bible.
2. (Zool.) A marine bivalve shell (Arca Noae), which
somewhat resembles an ark, or ship, in form.
3. A child's toy, consisting of an ark-shaped box containing
many different wooden animals.
4. (Fig.) Anything having a wide and representative
assortment of people or objects of a particular class; as,
the bar scene in Star Wars was a Noah's Ark of almost
every imaginable alien form..