1. (

• nautilus ,
• nuclear_submarine ,
• nuclear-powered_submarine

) a submarine that is propelled by nuclear power ;

2. (

• paper_nautilus ,
• nautilus ,
• Argonaut ,
• Argonauta_argo

) cephalopod mollusk of warm seas whose females have delicate papery spiral shells ;

3. (

• chambered_nautilus ,
• pearly_nautilus ,
• nautilus ,

) cephalopod of the Indian and Pacific oceans having a spiral shell with pale pearly partitions ;