"zettahertz" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "zetta",
        "3": "hertz"
      },
      "expansion": "zetta- + hertz",
      "name": "prefix"
    }
  ],
  "etymology_text": "From zetta- + hertz.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "zettahertz (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with zetta-",
          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Metrology",
          "orig": "en:Metrology",
          "parents": [
            "Applied sciences",
            "Sciences",
            "All topics",
            "Fundamental"
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          "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": [
        "An SI unit of frequency equal to 10²¹ hertz."
      ],
      "id": "en-zettahertz-en-noun-ClIgyIeC",
      "links": [
        [
          "metrology",
          "metrology"
        ],
        [
          "frequency",
          "frequency"
        ],
        [
          "hertz",
          "hertz"
        ]
      ],
      "raw_glosses": [
        "(metrology) An SI unit of frequency equal to 10²¹ hertz."
      ],
      "synonyms": [
        {
          "word": "ZHz"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "metrology"
      ]
    }
  ],
  "word": "zettahertz"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "zetta",
        "3": "hertz"
      },
      "expansion": "zetta- + hertz",
      "name": "prefix"
    }
  ],
  "etymology_text": "From zetta- + hertz.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "zettahertz (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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      ],
      "glosses": [
        "An SI unit of frequency equal to 10²¹ hertz."
      ],
      "links": [
        [
          "metrology",
          "metrology"
        ],
        [
          "frequency",
          "frequency"
        ],
        [
          "hertz",
          "hertz"
        ]
      ],
      "raw_glosses": [
        "(metrology) An SI unit of frequency equal to 10²¹ hertz."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "metrology"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "ZHz"
    }
  ],
  "word": "zettahertz"
}