"microswimmer" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "micro",
        "3": "swimmer"
      },
      "expansion": "micro- + swimmer",
      "name": "prefix"
    }
  ],
  "etymology_text": "From micro- + swimmer.",
  "forms": [
    {
      "form": "microswimmers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "microswimmer (plural microswimmers)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with micro-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A very small device that propels itself without friction by surface treadmilling."
      ],
      "id": "en-microswimmer-en-noun-rSjrLMdF",
      "links": [
        [
          "device",
          "device"
        ],
        [
          "propel",
          "propel"
        ],
        [
          "friction",
          "friction"
        ],
        [
          "surface",
          "surface"
        ],
        [
          "treadmilling",
          "treadmilling"
        ]
      ],
      "related": [
        {
          "word": "microswimming"
        }
      ]
    }
  ],
  "word": "microswimmer"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "micro",
        "3": "swimmer"
      },
      "expansion": "micro- + swimmer",
      "name": "prefix"
    }
  ],
  "etymology_text": "From micro- + swimmer.",
  "forms": [
    {
      "form": "microswimmers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "microswimmer (plural microswimmers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "microswimming"
    }
  ],
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with micro-",
        "Pages with 1 entry"
      ],
      "glosses": [
        "A very small device that propels itself without friction by surface treadmilling."
      ],
      "links": [
        [
          "device",
          "device"
        ],
        [
          "propel",
          "propel"
        ],
        [
          "friction",
          "friction"
        ],
        [
          "surface",
          "surface"
        ],
        [
          "treadmilling",
          "treadmilling"
        ]
      ]
    }
  ],
  "word": "microswimmer"
}