"millihertz" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "milli-",
        "3": "hertz"
      },
      "expansion": "milli- + hertz",
      "name": "af"
    }
  ],
  "etymology_text": "From milli- + hertz.",
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-"
      },
      "expansion": "millihertz m (uncountable)",
      "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 milli-",
          "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": "fr",
          "name": "SI units",
          "orig": "fr:SI units",
          "parents": [
            "Units of measure",
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "millihertz"
      ],
      "id": "en-millihertz-fr-noun-mwb350IP",
      "links": [
        [
          "millihertz",
          "millihertz#English"
        ]
      ],
      "tags": [
        "masculine",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mi.ji.ɛʁ/"
    }
  ],
  "word": "millihertz"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "milli-",
        "3": "hertz"
      },
      "expansion": "milli- + hertz",
      "name": "af"
    }
  ],
  "etymology_text": "From milli- + hertz.",
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-"
      },
      "expansion": "millihertz m (uncountable)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French 3-syllable words",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French nouns",
        "French terms prefixed with milli-",
        "French terms with IPA pronunciation",
        "French uncountable nouns",
        "Pages with 2 entries",
        "Pages with entries",
        "fr:SI units"
      ],
      "glosses": [
        "millihertz"
      ],
      "links": [
        [
          "millihertz",
          "millihertz#English"
        ]
      ],
      "tags": [
        "masculine",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mi.ji.ɛʁ/"
    }
  ],
  "word": "millihertz"
}