"black rain" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "Nuclear warfare",
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      "glosses": [
        "Rain contaminated by fungi spores, soot, or other particulate matter."
      ],
      "id": "en-black_rain-en-noun-3RZq7Qf6",
      "links": [
        [
          "Rain",
          "rain"
        ],
        [
          "fungi",
          "fungi"
        ],
        [
          "spore",
          "spore"
        ],
        [
          "soot",
          "soot"
        ],
        [
          "particulate matter",
          "particulate matter"
        ]
      ],
      "tags": [
        "uncountable"
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          "langcode": "en",
          "name": "Atomic bombings of Hiroshima and Nagasaki",
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      ],
      "glosses": [
        "Radioactive rain that fell on Hiroshima following the atomic bombing of 1945."
      ],
      "id": "en-black_rain-en-noun-UvIldfxh",
      "links": [
        [
          "Radioactive",
          "radioactive"
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          "Hiroshima",
          "Hiroshima"
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        [
          "atomic",
          "atomic"
        ],
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          "bombing",
          "bombing"
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      "tags": [
        "uncountable"
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      "translations": [
        {
          "_dis1": "28 72",
          "alt": "くろいあめ",
          "code": "ja",
          "lang": "Japanese",
          "roman": "kuroi ame",
          "sense": "radioactive rain",
          "word": "黒い雨"
        }
      ]
    }
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  "word": "black rain"
}

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    "en:Atomic bombings of Hiroshima and Nagasaki",
    "en:Nuclear warfare"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "Rain contaminated by fungi spores, soot, or other particulate matter."
      ],
      "links": [
        [
          "Rain",
          "rain"
        ],
        [
          "fungi",
          "fungi"
        ],
        [
          "spore",
          "spore"
        ],
        [
          "soot",
          "soot"
        ],
        [
          "particulate matter",
          "particulate matter"
        ]
      ],
      "tags": [
        "uncountable"
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    },
    {
      "glosses": [
        "Radioactive rain that fell on Hiroshima following the atomic bombing of 1945."
      ],
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        [
          "Radioactive",
          "radioactive"
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          "Hiroshima",
          "Hiroshima"
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          "atomic",
          "atomic"
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          "bombing",
          "bombing"
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  "translations": [
    {
      "alt": "くろいあめ",
      "code": "ja",
      "lang": "Japanese",
      "roman": "kuroi ame",
      "sense": "radioactive rain",
      "word": "黒い雨"
    }
  ],
  "word": "black rain"
}