Showing results for hydronaut. Search instead for hydronium.

hydronaut

American

[hahy-druh-nawt, -not] / ˈhaɪ drəˌnɔt, -ˌnɒt /

noun

a person trained to work in deep-sea vessels for research and rescue purposes.

hydronaut British

/ ˈhaɪdrəʊˌnɔːt /

noun

navy a person trained to operate deep submergence vessels

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of hydronaut

An Americanism dating back to 1965–70; hydro- ¹ + (aero)naut

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023