"tank-worm" meaning in English

{
  "etymology_text": "So-named as it was commonly found in the mud in water tanks of India in the 19th century.",
  "forms": [
    {
      "form": "tank-worms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tank-worm (plural tank-worms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Indian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Nematodes",
          "orig": "en:Nematodes",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A small nematoid worm, likely to be the young of the guinea-worm."
      ],
      "id": "en-tank-worm-en-noun-D~18Zhxl",
      "links": [
        [
          "nematoid",
          "nematoid"
        ],
        [
          "worm",
          "worm"
        ],
        [
          "young",
          "young"
        ],
        [
          "guinea-worm",
          "guinea-worm"
        ]
      ],
      "raw_glosses": [
        "(archaic, India) A small nematoid worm, likely to be the young of the guinea-worm."
      ],
      "tags": [
        "India",
        "archaic"
      ]
    }
  ],
  "word": "tank-worm"
}

{
  "etymology_text": "So-named as it was commonly found in the mud in water tanks of India in the 19th century.",
  "forms": [
    {
      "form": "tank-worms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tank-worm (plural tank-worms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with archaic senses",
        "Indian English",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Nematodes"
      ],
      "glosses": [
        "A small nematoid worm, likely to be the young of the guinea-worm."
      ],
      "links": [
        [
          "nematoid",
          "nematoid"
        ],
        [
          "worm",
          "worm"
        ],
        [
          "young",
          "young"
        ],
        [
          "guinea-worm",
          "guinea-worm"
        ]
      ],
      "raw_glosses": [
        "(archaic, India) A small nematoid worm, likely to be the young of the guinea-worm."
      ],
      "tags": [
        "India",
        "archaic"
      ]
    }
  ],
  "word": "tank-worm"
}