"numero triangolare" meaning in All languages combined

{
  "forms": [
    {
      "form": "numeri triangolari",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "numero triangolare m (plural numeri triangolari)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "it",
          "name": "Mathematics",
          "orig": "it:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "triangular number"
      ],
      "id": "en-numero_triangolare-it-noun-xVG2SNGH",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "triangular number",
          "triangular number"
        ]
      ],
      "raw_glosses": [
        "(mathematics) triangular number"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "it:numero triangolare"
      ]
    }
  ],
  "word": "numero triangolare"
}

{
  "forms": [
    {
      "form": "numeri triangolari",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "numero triangolare m (plural numeri triangolari)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian multiword terms",
        "Italian nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "it:Mathematics"
      ],
      "glosses": [
        "triangular number"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "triangular number",
          "triangular number"
        ]
      ],
      "raw_glosses": [
        "(mathematics) triangular number"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "it:numero triangolare"
      ]
    }
  ],
  "word": "numero triangolare"
}