"rubidium-strontium" meaning in All languages combined

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      "expansion": "rubidium-strontium (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rubidium",
          "orig": "en:Rubidium",
          "parents": [
            "Alkali metals",
            "Chemical elements",
            "Metals",
            "Matter",
            "Metallurgy",
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Strontium",
          "orig": "en:Strontium",
          "parents": [
            "Alkaline earth metals",
            "Chemical elements",
            "Metals",
            "Matter",
            "Metallurgy",
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      "examples": [
        {
          "ref": "1999, Jonathan I Lunine, Earth: Evolution of a Habitable World, page 101:",
          "text": "Isotopic dating of meteorites using the rubidium-strontium system and others indicates that the most primitive rocks in the solar system are 4.56 billion years old, determined rather precisely.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87."
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          "rubidium",
          "rubidium"
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          "strontium",
          "strontium"
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        "(attributive) Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87."
      ],
      "synonyms": [
        {
          "word": "Rb-Sr"
        }
      ],
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        "attributive",
        "uncountable"
      ],
      "wikipedia": [
        "Rubidium-strontium dating"
      ]
    }
  ],
  "word": "rubidium-strontium"
}

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  "lang_code": "en",
  "pos": "noun",
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        "en:Radioactivity",
        "en:Rubidium",
        "en:Strontium"
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        {
          "ref": "1999, Jonathan I Lunine, Earth: Evolution of a Habitable World, page 101:",
          "text": "Isotopic dating of meteorites using the rubidium-strontium system and others indicates that the most primitive rocks in the solar system are 4.56 billion years old, determined rather precisely.",
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        }
      ],
      "glosses": [
        "Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87."
      ],
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          "strontium"
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      "raw_glosses": [
        "(attributive) Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87."
      ],
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        "attributive",
        "uncountable"
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      "wikipedia": [
        "Rubidium-strontium dating"
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  "synonyms": [
    {
      "word": "Rb-Sr"
    }
  ],
  "word": "rubidium-strontium"
}