"tridiagonal" meaning in English

{
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        "2": "tri-",
        "3": "diagonal"
      },
      "expansion": "tri- + diagonal",
      "name": "prefix"
    }
  ],
  "etymology_text": "From tri- + diagonal.",
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      "expansion": "tridiagonal (not comparable)",
      "name": "en-adj"
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  "lang_code": "en",
  "pos": "adj",
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          "name": "Linear algebra",
          "orig": "en:Linear algebra",
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        }
      ],
      "derived": [
        {
          "word": "tridiagonality"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              111,
              122
            ]
          ],
          "ref": "2019 June 24, Juan Triana, “Negafibonacci Numbers via Matrices”, in Bulletin of TICMI, volume 23, number 1, →ISSN, archived from the original on 13 Jul 2019, Negafibonacci numbers as tridiagonal matrix determinants, page 3:",
          "text": "The following proposition shows a connection between negafibonacci numbers and the determinants of a family of tridiagonal matrices.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Having nonzero elements only in the main diagonal and the diagonals directly above and below it."
      ],
      "id": "en-tridiagonal-en-adj-vilgugl1",
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          "linear algebra",
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          "matrix",
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        ],
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        ],
        [
          "element",
          "element"
        ],
        [
          "diagonal",
          "diagonal"
        ]
      ],
      "raw_glosses": [
        "(linear algebra, of a matrix) Having nonzero elements only in the main diagonal and the diagonals directly above and below it."
      ],
      "raw_tags": [
        "of a matrix"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "linear-algebra",
        "mathematics",
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      ]
    }
  ],
  "word": "tridiagonal"
}

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  "derived": [
    {
      "word": "tridiagonality"
    }
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    {
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  ],
  "etymology_text": "From tri- + diagonal.",
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          "text": "The following proposition shows a connection between negafibonacci numbers and the determinants of a family of tridiagonal matrices.",
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        }
      ],
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        "Having nonzero elements only in the main diagonal and the diagonals directly above and below it."
      ],
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        "(linear algebra, of a matrix) Having nonzero elements only in the main diagonal and the diagonals directly above and below it."
      ],
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        "of a matrix"
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  "word": "tridiagonal"
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