"terasecond" meaning in English

{
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        "2": "tera",
        "3": "second"
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      "expansion": "tera- + second",
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  ],
  "etymology_text": "From tera- + second.",
  "forms": [
    {
      "form": "teraseconds",
      "tags": [
        "plural"
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  "lang_code": "en",
  "pos": "noun",
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          "source": "w"
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          "source": "w"
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          "name": "Time",
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        {
          "ref": "1977, Isaac Asimov, Asimov on numbers:",
          "text": "The solar system has been in existence for about 150000 teraseconds and may well remain in existence without major change for 500000 additional teraseconds.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An SI unit of time equal to 10¹² seconds. Symbol: Ts"
      ],
      "id": "en-terasecond-en-noun--usp8ktF",
      "links": [
        [
          "metrology",
          "metrology"
        ],
        [
          "time",
          "time#English"
        ],
        [
          "second",
          "second"
        ],
        [
          "Ts",
          "Ts"
        ]
      ],
      "raw_glosses": [
        "(metrology) An SI unit of time equal to 10¹² seconds. Symbol: Ts"
      ],
      "topics": [
        "metrology"
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      "translations": [
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "1,000,000,000,000 seconds",
          "tags": [
            "feminine"
          ],
          "word": "terasekunda"
        }
      ]
    }
  ],
  "word": "terasecond"
}

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        "2": "tera",
        "3": "second"
      },
      "expansion": "tera- + second",
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    }
  ],
  "etymology_text": "From tera- + second.",
  "forms": [
    {
      "form": "teraseconds",
      "tags": [
        "plural"
      ]
    }
  ],
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  "lang_code": "en",
  "pos": "noun",
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        {
          "ref": "1977, Isaac Asimov, Asimov on numbers:",
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          "type": "quote"
        }
      ],
      "glosses": [
        "An SI unit of time equal to 10¹² seconds. Symbol: Ts"
      ],
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        [
          "metrology",
          "metrology"
        ],
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          "time",
          "time#English"
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          "Ts",
          "Ts"
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        "(metrology) An SI unit of time equal to 10¹² seconds. Symbol: Ts"
      ],
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        "metrology"
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    {
      "code": "pl",
      "lang": "Polish",
      "sense": "1,000,000,000,000 seconds",
      "tags": [
        "feminine"
      ],
      "word": "terasekunda"
    }
  ],
  "word": "terasecond"
}