"pentadiagonal" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "penta",
        "3": "diagonal"
      },
      "expansion": "penta- + diagonal",
      "name": "prefix"
    }
  ],
  "etymology_text": "penta- + diagonal",
  "head_templates": [
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      "args": {
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      "expansion": "pentadiagonal (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "name": "English terms prefixed with penta-",
          "parents": [],
          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
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            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "In which the only nonzero entries are on the main diagonal, and the first two diagonals above and below it"
      ],
      "id": "en-pentadiagonal-en-adj-tdXt~MZr",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "nonzero",
          "nonzero"
        ],
        [
          "main diagonal",
          "main diagonal"
        ],
        [
          "diagonal",
          "diagonal"
        ]
      ],
      "raw_glosses": [
        "(mathematics, of a matrix) In which the only nonzero entries are on the main diagonal, and the first two diagonals above and below it"
      ],
      "raw_tags": [
        "of a matrix"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "pentadiagonal matrix"
      ]
    }
  ],
  "word": "pentadiagonal"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "penta",
        "3": "diagonal"
      },
      "expansion": "penta- + diagonal",
      "name": "prefix"
    }
  ],
  "etymology_text": "penta- + diagonal",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "pentadiagonal (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
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      ],
      "glosses": [
        "In which the only nonzero entries are on the main diagonal, and the first two diagonals above and below it"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
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          "main diagonal",
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        ],
        [
          "diagonal",
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      ],
      "raw_glosses": [
        "(mathematics, of a matrix) In which the only nonzero entries are on the main diagonal, and the first two diagonals above and below it"
      ],
      "raw_tags": [
        "of a matrix"
      ],
      "tags": [
        "not-comparable"
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      "topics": [
        "mathematics",
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      "wikipedia": [
        "pentadiagonal matrix"
      ]
    }
  ],
  "word": "pentadiagonal"
}