"iron(III) oxide" meaning in English

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  "etymology_text": "From iron + translingual III + oxide.",
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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
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          "text": "Coordinate term: iron(II) oxide"
        }
      ],
      "glosses": [
        "The chemical compound Fe₂O₃: the iron oxide in which iron has a valence of +3."
      ],
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          "iron oxide",
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      "raw_glosses": [
        "(chemistry) The chemical compound Fe₂O₃: the iron oxide in which iron has a valence of +3."
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      "related": [
        {
          "english": "a principal ore",
          "word": "hematite"
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      "synonyms": [
        {
          "word": "ferric oxide[Appendix:Glossary#dated|dated]]>"
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        "uncountable"
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      "translations": [
        {
          "code": "fa",
          "lang": "Persian",
          "roman": "âhan-e se oksid",
          "sense": "Fe2O3",
          "word": "آهن(III) اکسید"
        },
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          "code": "sk",
          "lang": "Slovak",
          "sense": "Fe2O3",
          "tags": [
            "masculine"
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          "word": "oxid železitý"
        }
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        "iron(III) oxide"
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  "word": "iron(III) oxide"
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  "lang_code": "en",
  "pos": "noun",
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      "english": "a principal ore",
      "word": "hematite"
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        "(chemistry) The chemical compound Fe₂O₃: the iron oxide in which iron has a valence of +3."
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      "code": "fa",
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      "roman": "âhan-e se oksid",
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      "word": "آهن(III) اکسید"
    },
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      "sense": "Fe2O3",
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      "word": "oxid železitý"
    }
  ],
  "word": "iron(III) oxide"
}