"controvapore" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "contro",
        "3": "vapore"
      },
      "expansion": "contro- + vapore",
      "name": "prefix"
    }
  ],
  "etymology_text": "From contro- + vapore.",
  "forms": [
    {
      "form": "controvapori",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "controvapore m (plural controvapori)",
      "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": "Italian terms prefixed with contro-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "steam brake on a locomotive",
          "word": "freno a controvapore"
        }
      ],
      "glosses": [
        "reverse steam"
      ],
      "id": "en-controvapore-it-noun-7nME60Fa",
      "links": [
        [
          "reverse",
          "reverse"
        ],
        [
          "steam",
          "steam"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "controvapore"
}

{
  "derived": [
    {
      "english": "steam brake on a locomotive",
      "word": "freno a controvapore"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "contro",
        "3": "vapore"
      },
      "expansion": "contro- + vapore",
      "name": "prefix"
    }
  ],
  "etymology_text": "From contro- + vapore.",
  "forms": [
    {
      "form": "controvapori",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "controvapore m (plural controvapori)",
      "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 nouns",
        "Italian terms prefixed with contro-",
        "Pages with 1 entry"
      ],
      "glosses": [
        "reverse steam"
      ],
      "links": [
        [
          "reverse",
          "reverse"
        ],
        [
          "steam",
          "steam"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "controvapore"
}