nautilus

A noun referring to a marine cephalopod mollusk with a spiral shell, found in warm seas, or to a type of nuclear-powered submarine.

• 🇩🇪Substantiv, das einen Kopffüßer mit spiraligem Gehäuse bezeichnet, der in warmen Meeren lebt, sowie einen Typ von Atom-U-Boot.

1. Nuclear-powered submarine B2 formal

   A type of submarine that is propelled by nuclear power, capable of long-range underwater travel.

   • The Nautilus was the first nuclear-powered submarine in history.
   • The crew embarked on a mission aboard the nuclear submarine.
   • Modern navies operate nuclear submarines for strategic defense.

   🇩🇪Atom-U-Boot

2. Paper nautilus (Argonauta) C1 formal scientific

   A cephalopod mollusk of warm seas whose females have a delicate, papery spiral shell used for buoyancy and brooding eggs.

   • The paper nautilus is known for its fragile, translucent shell.
   • Female argonauts produce a papery shell that is not attached to their body.
   • Marine biologists study the paper nautilus for its unique reproductive behavior.

   🇩🇪Papierboot (Argonauta)

   Synonyme: paper nautilus

3. Chambered nautilus (Nautilus) C1 formal scientific

   A cephalopod of the Indian and Pacific oceans having a spiral shell with pale pearly partitions, known for its buoyancy control.

   • The chambered nautilus uses gas-filled chambers in its shell to control buoyancy.
   • Its spiral shell is prized for its pearly interior.
   • Nautiluses are considered living fossils, unchanged for millions of years.

   🇩🇪Perlboot

   Synonyme: chambered nautiluspearly nautilus

• nautili plural form
• nautiluses plural form
• nautili's possessive plural form
• nautiluses' possessive plural form
• nautilus's possessive singular form