"ferrocerium" meaning in English

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        "2": ":af",
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      "expansion": "Etymology tree\nsubstratebor.\nOld Latin *fersom\nLatin ferrum\nEnglish ferro-\nEnglish cerium\nEnglish ferrocerium\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"lang_name\" : \"substrate\", \"status\" : \"ok\", \"children\" : [ ], \"lang\" : \"qfa-sub\" } ], \"keyword\" : \"bor\" } ], \"lang\" : \"itc-ola\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"ferrum\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"uder\" } ], \"lang_name\" : \"English\", \"term\" : \"ferro-\", \"status\" : \"ok\", \"lang\" : \"en\" }, { \"children\" : [ ], \"lang_name\" : \"English\", \"term\" : \"cerium\", \"status\" : \"missing\", \"lang\" : \"en\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"English\", \"term\" : \"ferrocerium\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"ferrocerium\">\nFrom ferro- + cerium.",
      "name": "ety"
    }
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  "etymology_text": "Etymology tree\nsubstratebor.\nOld Latin *fersom\nLatin ferrum\nEnglish ferro-\nEnglish cerium\nEnglish ferrocerium\nFrom ferro- + cerium.",
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  "lang_code": "en",
  "pos": "noun",
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          "name": "Cerium",
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      "glosses": [
        "A pyrophoric alloy of iron and cerium that is used with a striker (a steel) to make the spark of a lighter or firestarter."
      ],
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          "iron"
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          "cerium",
          "cerium"
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          "spark",
          "spark#Noun"
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    {
      "ipa": "/ˌfɛɹoʊˈsɪəɹiəm/"
    },
    {
      "rhymes": "-ɪəɹiəm"
    }
  ],
  "word": "ferrocerium"
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  "word": "ferrocerium"
}