"宇宙背景放射" meaning in Japanese

{
  "etymology_text": "From 宇宙(space) + 背景(background) + 放射(radiation)",
  "forms": [
    {
      "form": "宇宙背景放射",
      "ruby": [
        [
          "宇",
          "う"
        ],
        [
          "宙",
          "ちゅう"
        ],
        [
          "背",
          "はい"
        ],
        [
          "景",
          "けい"
        ],
        [
          "放",
          "ほう"
        ],
        [
          "射",
          "しゃ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "uchūhaikeihōsha",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "うちゅうはいけいほうしゃ"
      },
      "expansion": "宇(う)宙(ちゅう)背(はい)景(けい)放(ほう)射(しゃ) • (uchūhaikeihōsha)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms read with on'yomi",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 6 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ja",
          "name": "Astronomy",
          "orig": "ja:Astronomy",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "cosmic background radiation"
      ],
      "id": "en-宇宙背景放射-ja-noun-Rcj0Oo1X",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "cosmic background radiation",
          "cosmic background radiation"
        ]
      ],
      "raw_glosses": [
        "(astronomy) cosmic background radiation"
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "word": "宇宙背景放射"
}

{
  "etymology_text": "From 宇宙(space) + 背景(background) + 放射(radiation)",
  "forms": [
    {
      "form": "宇宙背景放射",
      "ruby": [
        [
          "宇",
          "う"
        ],
        [
          "宙",
          "ちゅう"
        ],
        [
          "背",
          "はい"
        ],
        [
          "景",
          "けい"
        ],
        [
          "放",
          "ほう"
        ],
        [
          "射",
          "しゃ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "uchūhaikeihōsha",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "うちゅうはいけいほうしゃ"
      },
      "expansion": "宇(う)宙(ちゅう)背(はい)景(けい)放(ほう)射(しゃ) • (uchūhaikeihōsha)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms read with on'yomi",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms spelled with 宇 read as う",
        "Japanese terms spelled with 宙 read as ちゅう",
        "Japanese terms spelled with 射 read as しゃ",
        "Japanese terms spelled with 放 read as ほう",
        "Japanese terms spelled with 景 read as けい",
        "Japanese terms spelled with 背 read as はい",
        "Japanese terms with 6 kanji",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Pages with 1 entry",
        "Pages with entries",
        "ja:Astronomy"
      ],
      "glosses": [
        "cosmic background radiation"
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "cosmic background radiation",
          "cosmic background radiation"
        ]
      ],
      "raw_glosses": [
        "(astronomy) cosmic background radiation"
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "word": "宇宙背景放射"
}