"Lissajous knot" meaning in English

{
  "forms": [
    {
      "form": "Lissajous knots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "Lissajous knot (plural Lissajous knots)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "English entries with incorrect language header",
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      "glosses": [
        "A knot defined by certain parametric equations. Its projection onto any of the three coordinate planes is a Lissajous curve."
      ],
      "id": "en-Lissajous_knot-en-noun-mpvP8iR-",
      "links": [
        [
          "parametric equation",
          "parametric equation"
        ],
        [
          "projection",
          "projection"
        ],
        [
          "Lissajous curve",
          "Lissajous curve"
        ]
      ],
      "wikipedia": [
        "Lissajous knot"
      ]
    }
  ],
  "word": "Lissajous knot"
}

{
  "forms": [
    {
      "form": "Lissajous knots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "Lissajous knot (plural Lissajous knots)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
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        "Pages with entries"
      ],
      "glosses": [
        "A knot defined by certain parametric equations. Its projection onto any of the three coordinate planes is a Lissajous curve."
      ],
      "links": [
        [
          "parametric equation",
          "parametric equation"
        ],
        [
          "projection",
          "projection"
        ],
        [
          "Lissajous curve",
          "Lissajous curve"
        ]
      ],
      "wikipedia": [
        "Lissajous knot"
      ]
    }
  ],
  "word": "Lissajous knot"
}