"megametro" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "mega-",
        "3": "metro"
      },
      "expansion": "mega- + metro",
      "name": "af"
    }
  ],
  "etymology_text": "From mega- + metro.",
  "forms": [
    {
      "form": "megametri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "megametro m (plural megametri)",
      "name": "it-noun"
    }
  ],
  "hyphenation": [
    "me‧gà‧me‧tro"
  ],
  "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"
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          "source": "w"
        },
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          "kind": "other",
          "name": "Italian terms prefixed with mega-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "it",
          "name": "SI units",
          "orig": "it:SI units",
          "parents": [
            "Units of measure",
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "megametre (a distance of 1,000 km)"
      ],
      "id": "en-megametro-it-noun-a8514~03",
      "links": [
        [
          "megametre",
          "megametre"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/meˈɡa.me.tro/"
    },
    {
      "rhymes": "-ametro"
    }
  ],
  "word": "megametro"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "mega-",
        "3": "metro"
      },
      "expansion": "mega- + metro",
      "name": "af"
    }
  ],
  "etymology_text": "From mega- + metro.",
  "forms": [
    {
      "form": "megametri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "megametro m (plural megametri)",
      "name": "it-noun"
    }
  ],
  "hyphenation": [
    "me‧gà‧me‧tro"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
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        "Italian 4-syllable words",
        "Italian countable nouns",
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        "Italian masculine nouns",
        "Italian nouns",
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        "Pages with entries",
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        "it:SI units"
      ],
      "glosses": [
        "megametre (a distance of 1,000 km)"
      ],
      "links": [
        [
          "megametre",
          "megametre"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/meˈɡa.me.tro/"
    },
    {
      "rhymes": "-ametro"
    }
  ],
  "word": "megametro"
}