"decameter" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fr",
        "3": "décamètre"
      },
      "expansion": "French décamètre",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "deca",
        "3": "meter"
      },
      "expansion": "deca- + meter",
      "name": "prefix"
    }
  ],
  "etymology_text": "Borrowed from French décamètre. Equivalent to deca- + meter.",
  "forms": [
    {
      "form": "decameters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "decameter (plural decameters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "decametre"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with deca-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "SI units",
          "orig": "en:SI units",
          "parents": [
            "Units of measure",
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "US spelling of decametre"
      ],
      "id": "en-decameter-en-noun-QlcKroOP",
      "links": [
        [
          "decametre",
          "decametre#English"
        ]
      ],
      "tags": [
        "US",
        "alt-of"
      ]
    }
  ],
  "word": "decameter"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fr",
        "3": "décamètre"
      },
      "expansion": "French décamètre",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "deca",
        "3": "meter"
      },
      "expansion": "deca- + meter",
      "name": "prefix"
    }
  ],
  "etymology_text": "Borrowed from French décamètre. Equivalent to deca- + meter.",
  "forms": [
    {
      "form": "decameters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "decameter (plural decameters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "decametre"
        }
      ],
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English nouns",
        "English terms borrowed from French",
        "English terms derived from French",
        "English terms prefixed with deca-",
        "Pages with 2 entries",
        "en:SI units"
      ],
      "glosses": [
        "US spelling of decametre"
      ],
      "links": [
        [
          "decametre",
          "decametre#English"
        ]
      ],
      "tags": [
        "US",
        "alt-of"
      ]
    }
  ],
  "word": "decameter"
}