A spiral-shelled sea creature with tentacles that lives in the ocean, or a submarine designed to resemble this creature.
From Greek 'nautilus' (sailor), from 'nautes' (sailor), from 'naus' (ship). The Greeks named this creature 'the sailor' because they observed it moving through water with apparent skill.
The nautilus inspired both Jules Verne's submarine 'Nautilus' in '20,000 Leagues Under the Sea' and became the symbol of the golden ratio—its spiral shell grows in perfect mathematical proportion, making it nature's most famous example of geometry that also happens to be alive.
Complete word intelligence in one call. Free tier — 50 lookups/day.