"mégatonne" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "méga-",
        "3": "tonne"
      },
      "expansion": "méga- + tonne",
      "name": "af"
    }
  ],
  "etymology_text": "From méga- + tonne.",
  "forms": [
    {
      "form": "mégatonnes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "mégatonne f (plural mégatonnes)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French terms prefixed with méga-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Nuclear warfare",
          "orig": "fr:Nuclear warfare",
          "parents": [
            "War",
            "Weapons",
            "Conflict",
            "Military",
            "Violence",
            "Hunting",
            "Tools",
            "Human behaviour",
            "Society",
            "Human activity",
            "Technology",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "megaton (all senses)"
      ],
      "id": "en-mégatonne-fr-noun-HVlQtnqn",
      "links": [
        [
          "megaton",
          "megaton"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "mégatonne"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "méga-",
        "3": "tonne"
      },
      "expansion": "méga- + tonne",
      "name": "af"
    }
  ],
  "etymology_text": "From méga- + tonne.",
  "forms": [
    {
      "form": "mégatonnes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "mégatonne f (plural mégatonnes)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French nouns",
        "French terms prefixed with méga-",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Nuclear warfare"
      ],
      "glosses": [
        "megaton (all senses)"
      ],
      "links": [
        [
          "megaton",
          "megaton"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "mégatonne"
}