noun
- a person who explores the ocean depths, especially in a submersible vessel
Usage: technical
Examples
- The oceanaut descended to the deepest part of the trench.
- Modern oceanauts use advanced submersibles to study marine life.
- She trained for years to become a professional oceanaut.
- The oceanaut’s mission was to map the seafloor.
- Oceanauts have discovered new species in the deep ocean.
- The research team included three experienced oceanauts.