"Trossulum" meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "proper noun"
      },
      "expansion": "Trossulum",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "la",
          "name": "Ancient settlements",
          "orig": "la:Ancient settlements",
          "parents": [
            "Historical settlements",
            "Historical polities",
            "Polities",
            "Places",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "Trossuli"
        },
        {
          "word": "trossulus"
        }
      ],
      "glosses": [
        "An ancient town in Etruria"
      ],
      "id": "en-Trossulum-la-name-sPwdRLm~",
      "links": [
        [
          "Etruria",
          "Etruria#English"
        ]
      ]
    }
  ],
  "word": "Trossulum"
}

{
  "derived": [
    {
      "word": "Trossuli"
    },
    {
      "word": "trossulus"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "proper noun"
      },
      "expansion": "Trossulum",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Latin entries with incorrect language header",
        "Latin lemmas",
        "Latin proper nouns",
        "la:Ancient settlements"
      ],
      "glosses": [
        "An ancient town in Etruria"
      ],
      "links": [
        [
          "Etruria",
          "Etruria#English"
        ]
      ]
    }
  ],
  "word": "Trossulum"
}