"ferrous metal" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "待分類的英語詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "拉丁文字",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "航海科技專有名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "黑色金属\n* 简体: 黑色金属[航海科技]\n* 正體: 鐵金屬[海事]"
      ],
      "id": "zh-ferrous_metal-en-unknown-OK4oJ~hp"
    }
  ],
  "word": "ferrous metal"
}

{
  "categories": [
    "待分類的英語詞",
    "拉丁文字",
    "航海科技專有名詞",
    "英語"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "黑色金属\n* 简体: 黑色金属[航海科技]\n* 正體: 鐵金屬[海事]"
      ]
    }
  ],
  "word": "ferrous metal"
}