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nature reserve
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nautilus

nau·ti·lus [ náwt'ləss ] (plural nau·ti·lus·es or nau·ti·li [ náwt'l l ])


noun 
Definition:
 
1. sea mollusk with coiled shell: a mollusk with numerous tentacles, a horny beak, and a spiral shell with gas-filled chambers for buoyancy. Native to: South Pacific and Indian oceans.  Genus Nautilus.

2. marine biology 
Same as  paper nautilus


[Early 17th century. Via Latin< Greek nautilos "sailor, nautilus" < nautēs (see nautical)]
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