"backswimmer" meaning in English

{
  "etymology_templates": [
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      "args": {
        "1": "en",
        "2": "back",
        "3": "swimmer"
      },
      "expansion": "back + swimmer",
      "name": "compound"
    }
  ],
  "etymology_text": "From back + swimmer.",
  "forms": [
    {
      "form": "backswimmers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backswimmer (plural backswimmers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Terms with Maori translations",
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          "kind": "other",
          "name": "Terms with Navajo translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "True bugs",
          "orig": "en:True bugs",
          "parents": [
            "Hemipterans",
            "Insects",
            "Arthropods",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "pygmy backswimmer"
        }
      ],
      "glosses": [
        "Any of various aquatic insects, of the family Notonectidae, that swim on their backs."
      ],
      "id": "en-backswimmer-en-noun-~HOpqn9-",
      "links": [
        [
          "aquatic",
          "aquatic"
        ],
        [
          "insect",
          "insect"
        ],
        [
          "Notonectidae",
          "Notonectidae#Translingual"
        ],
        [
          "swim",
          "swim"
        ],
        [
          "back",
          "back"
        ]
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "aquatic insect",
          "tags": [
            "neuter"
          ],
          "word": "bootsmannetje"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "aquatic insect",
          "word": "malluainen"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "aquatic insect",
          "tags": [
            "masculine"
          ],
          "word": "Rückenschwimmer"
        },
        {
          "code": "izh",
          "lang": "Ingrian",
          "sense": "aquatic insect",
          "word": "vesilucikkain"
        },
        {
          "code": "mi",
          "lang": "Maori",
          "sense": "aquatic insect",
          "word": "hoe tuarā"
        },
        {
          "code": "nv",
          "lang": "Navajo",
          "sense": "aquatic insect",
          "word": "tó bichʼosh"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "gládyš",
          "sense": "aquatic insect",
          "tags": [
            "masculine"
          ],
          "word": "гла́дыш"
        }
      ]
    }
  ],
  "word": "backswimmer"
}

{
  "derived": [
    {
      "word": "pygmy backswimmer"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "back",
        "3": "swimmer"
      },
      "expansion": "back + swimmer",
      "name": "compound"
    }
  ],
  "etymology_text": "From back + swimmer.",
  "forms": [
    {
      "form": "backswimmers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backswimmer (plural backswimmers)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English entries with incorrect language header",
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        "Terms with German translations",
        "Terms with Ingrian translations",
        "Terms with Maori translations",
        "Terms with Navajo translations",
        "Terms with Russian translations",
        "en:True bugs"
      ],
      "glosses": [
        "Any of various aquatic insects, of the family Notonectidae, that swim on their backs."
      ],
      "links": [
        [
          "aquatic",
          "aquatic"
        ],
        [
          "insect",
          "insect"
        ],
        [
          "Notonectidae",
          "Notonectidae#Translingual"
        ],
        [
          "swim",
          "swim"
        ],
        [
          "back",
          "back"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "aquatic insect",
      "tags": [
        "neuter"
      ],
      "word": "bootsmannetje"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "aquatic insect",
      "word": "malluainen"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "aquatic insect",
      "tags": [
        "masculine"
      ],
      "word": "Rückenschwimmer"
    },
    {
      "code": "izh",
      "lang": "Ingrian",
      "sense": "aquatic insect",
      "word": "vesilucikkain"
    },
    {
      "code": "mi",
      "lang": "Maori",
      "sense": "aquatic insect",
      "word": "hoe tuarā"
    },
    {
      "code": "nv",
      "lang": "Navajo",
      "sense": "aquatic insect",
      "word": "tó bichʼosh"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "gládyš",
      "sense": "aquatic insect",
      "tags": [
        "masculine"
      ],
      "word": "гла́дыш"
    }
  ],
  "word": "backswimmer"
}