There are 2 definitions of nautilus in English:

nautilus1

Syllabification: nau·ti·lus
Pronunciation: /ˈnôd(ə)ləs
 
/

noun (plural nautiluses or nautili /ˈnôtl-ī/)

1A cephalopod mollusk with a light external spiral shell and numerous short tentacles around the mouth. Nautiluses swim with the buoyant gas-filled shell upright and descend to greater depths during the day.
  • Genus Nautilus, the only surviving genus of the subclass Nautiloidea: several species, in particular the common chambered nautilus (Nautilus pompilius) of the Indo-Pacific, with a shell that is white with brownish bands on the outside and lined with mother-of-pearl on the inside
More example sentences
  • Some patterns in nature are formed by natural growth mechanisms, as with the spiral shape of the nautilus shell.
  • The beautiful nautilus shell is white to orange, with white stripes and a central, black whorl.
  • The shape of the museum is like a giant, spiral seashell - a nautilus - made of concrete.
2 (also paper nautilus) another term for argonaut.

Origin

modern Latin, from Latin, from Greek nautilos, literally 'sailor'.

Definition of nautilus in:

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There are 2 definitions of nautilus in English:

Nautilus2

Syllabification: Nau·ti·lus
Pronunciation: /ˈnôtl-əs
 
/
1The first nuclear-powered submarine, launched in 1954. This US Navy vessel made a historic journey (August 1-5, 1958) under the ice of the North Pole.
1.1 trademark An exercise machine that matches resistance with output of force.

Origin

a name previously given to Robert Fulton's “diving boat” (1800), also to the fictitious submarine in Jules Verne's Twenty Thousand Leagues under the Sea.

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