Hydronaut definitions

Hydronaut

1) Fictional submarine
Found on https://www.crosswordclues.com/clue/hydronaut

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hydronaut

hydronaut A person trained to work in deep-sea vessels for research and rescue purposes. Cross references of word families that refer to 'water': aqua-; hydat-; hygro-.
Found on http://www.wordinfo.info/words/index/info/view_unit/1009/9

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hydronaut

a person trained to work in deep-sea vessels for research and rescue purposes.
Found on https://www.infoplease.com/dictionary/hydronaut

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