"background radiation" meaning in English

{
  "forms": [
    {
      "form": "background radiations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "background radiation (usually uncountable, plural background radiations)",
      "name": "en-noun"
    }
  ],
  "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Radioactivity",
          "orig": "en:Radioactivity",
          "parents": [
            "Nuclear physics",
            "Radiation",
            "Physics",
            "Quantum mechanics",
            "Energy",
            "Sciences",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "ionizing radiation that is naturally present in the environment."
      ],
      "id": "en-background_radiation-en-noun-n9P-Bfcp",
      "links": [
        [
          "ionizing radiation",
          "ionizing radiation"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ],
      "translations": [
        {
          "code": "hy",
          "lang": "Armenian",
          "roman": "čaṙagaytʻayin fon",
          "sense": "ionizing radiation that is naturally present in the environment",
          "word": "ճառագայթային ֆոն"
        },
        {
          "code": "da",
          "lang": "Danish",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "common-gender"
          ],
          "word": "baggrundsstråling"
        },
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "feminine"
          ],
          "word": "achtergrondstraling"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "ionizing radiation that is naturally present in the environment",
          "word": "taustasäteily"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "masculine"
          ],
          "word": "rayonnement de fond"
        },
        {
          "code": "is",
          "lang": "Icelandic",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "feminine"
          ],
          "word": "bakgrunnsgeislun"
        },
        {
          "code": "no",
          "lang": "Norwegian",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "common-gender"
          ],
          "word": "bakgrunnsstråling"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "radiacionnyj fon",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "masculine"
          ],
          "word": "радиационный фон"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "ionizing radiation that is naturally present in the environment",
          "tags": [
            "common-gender"
          ],
          "word": "bakgrundsstrålning"
        },
        {
          "code": "vi",
          "lang": "Vietnamese",
          "sense": "ionizing radiation that is naturally present in the environment",
          "word": "phông phóng xạ"
        }
      ],
      "wikipedia": [
        "background radiation"
      ]
    }
  ],
  "word": "background radiation"
}

{
  "forms": [
    {
      "form": "background radiations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "background radiation (usually uncountable, plural background radiations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns",
        "en:Radioactivity"
      ],
      "glosses": [
        "ionizing radiation that is naturally present in the environment."
      ],
      "links": [
        [
          "ionizing radiation",
          "ionizing radiation"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ],
      "wikipedia": [
        "background radiation"
      ]
    }
  ],
  "translations": [
    {
      "code": "hy",
      "lang": "Armenian",
      "roman": "čaṙagaytʻayin fon",
      "sense": "ionizing radiation that is naturally present in the environment",
      "word": "ճառագայթային ֆոն"
    },
    {
      "code": "da",
      "lang": "Danish",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "common-gender"
      ],
      "word": "baggrundsstråling"
    },
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "feminine"
      ],
      "word": "achtergrondstraling"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "ionizing radiation that is naturally present in the environment",
      "word": "taustasäteily"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "masculine"
      ],
      "word": "rayonnement de fond"
    },
    {
      "code": "is",
      "lang": "Icelandic",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "feminine"
      ],
      "word": "bakgrunnsgeislun"
    },
    {
      "code": "no",
      "lang": "Norwegian",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "common-gender"
      ],
      "word": "bakgrunnsstråling"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "radiacionnyj fon",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "masculine"
      ],
      "word": "радиационный фон"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "ionizing radiation that is naturally present in the environment",
      "tags": [
        "common-gender"
      ],
      "word": "bakgrundsstrålning"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "sense": "ionizing radiation that is naturally present in the environment",
      "word": "phông phóng xạ"
    }
  ],
  "word": "background radiation"
}