"Heawood graph" meaning in English

{
  "etymology_text": "Named after Percy John Heawood.",
  "forms": [
    {
      "form": "Heawood graphs",
      "tags": [
        "plural"
      ]
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  ],
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      "expansion": "Heawood graph (plural Heawood graphs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "kind": "topical",
          "langcode": "en",
          "name": "Graph theory",
          "orig": "en:Graph theory",
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            "Formal sciences",
            "Computing",
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      ],
      "glosses": [
        "An undirected graph with 14 vertices and 21 edges."
      ],
      "id": "en-Heawood_graph-en-noun-yUV42NN9",
      "links": [
        [
          "graph theory",
          "graph theory"
        ],
        [
          "undirected graph",
          "undirected graph"
        ],
        [
          "vertices",
          "vertex"
        ],
        [
          "edge",
          "edge"
        ]
      ],
      "raw_glosses": [
        "(graph theory) An undirected graph with 14 vertices and 21 edges."
      ],
      "topics": [
        "graph-theory",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "Heawood graph"
}

{
  "etymology_text": "Named after Percy John Heawood.",
  "forms": [
    {
      "form": "Heawood graphs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Heawood graph (plural Heawood graphs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Graph theory"
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      "glosses": [
        "An undirected graph with 14 vertices and 21 edges."
      ],
      "links": [
        [
          "graph theory",
          "graph theory"
        ],
        [
          "undirected graph",
          "undirected graph"
        ],
        [
          "vertices",
          "vertex"
        ],
        [
          "edge",
          "edge"
        ]
      ],
      "raw_glosses": [
        "(graph theory) An undirected graph with 14 vertices and 21 edges."
      ],
      "topics": [
        "graph-theory",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "Heawood graph"
}