aquanaut
/ˈækwəˌnɔt/
noun
- A person who lives and works underwater for long periods, especially in an underwater research station or habitat.
- Becoming an aquanaut requires extensive training in diving and marine science.
- The aquanaut spent two weeks living in the underwater laboratory studying coral reefs.
- The team of aquanauts communicated with the surface ship via video link.
Synonyms