"Boring Billion" meaning in English

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  "etymology_text": "From boring + billion. From the remarkably stable environment of the time, over a period of 1 billion years, from climate, weather, geology, tectonic shifting, lifeforms.",
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      "glosses": [
        "The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic."
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        "(geology) The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic."
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      "synonyms": [
        {
          "word": "Barren Billion"
        },
        {
          "word": "Dullest Time in Earth's History"
        }
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  "word": "Boring Billion"
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  "etymology_text": "From boring + billion. From the remarkably stable environment of the time, over a period of 1 billion years, from climate, weather, geology, tectonic shifting, lifeforms.",
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        "(geology) The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic."
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        "natural-sciences"
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