"hydronaut" meaning in English

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        "2": "hydro",
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      "expansion": "hydro- + -naut",
      "name": "confix"
    }
  ],
  "etymology_text": "From hydro- + -naut.",
  "forms": [
    {
      "form": "hydronauts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hydronaut (plural hydronauts)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "source": "w"
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          "parents": [],
          "source": "w"
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          "parents": [],
          "source": "w"
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      ],
      "glosses": [
        "An undersea explorer, such as a submariner."
      ],
      "id": "en-hydronaut-en-noun-IZVxZf08",
      "links": [
        [
          "undersea",
          "undersea"
        ],
        [
          "explorer",
          "explorer"
        ],
        [
          "submariner",
          "submariner"
        ]
      ]
    }
  ],
  "word": "hydronaut"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "hydro",
        "3": "naut"
      },
      "expansion": "hydro- + -naut",
      "name": "confix"
    }
  ],
  "etymology_text": "From hydro- + -naut.",
  "forms": [
    {
      "form": "hydronauts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hydronaut (plural hydronauts)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "An undersea explorer, such as a submariner."
      ],
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        [
          "undersea",
          "undersea"
        ],
        [
          "explorer",
          "explorer"
        ],
        [
          "submariner",
          "submariner"
        ]
      ]
    }
  ],
  "word": "hydronaut"
}