"適者生存" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "てきしゃせいぞん"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "related": [
    {
      "word": "ダーウィニズム"
    },
    {
      "word": "自然淘汰"
    },
    {
      "word": "自然選択"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "日本語 生物学",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "生物の進化で自然の環境のなかでの生存競争で環境に適合した種が生き残ること。"
      ],
      "id": "ja-適者生存-ja-noun-iVakIoZy",
      "topics": [
        "biology"
      ]
    }
  ],
  "word": "適者生存"
}

{
  "categories": [
    "日本語",
    "日本語 名詞"
  ],
  "forms": [
    {
      "form": "てきしゃせいぞん"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "related": [
    {
      "word": "ダーウィニズム"
    },
    {
      "word": "自然淘汰"
    },
    {
      "word": "自然選択"
    }
  ],
  "senses": [
    {
      "categories": [
        "日本語 生物学"
      ],
      "glosses": [
        "生物の進化で自然の環境のなかでの生存競争で環境に適合した種が生き残ること。"
      ],
      "topics": [
        "biology"
      ]
    }
  ],
  "word": "適者生存"
}