"冶金学" meaning in Japanese

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  "etymology_text": "From 冶金 (yakin, “metallurgy”) + 学 (-gaku, “-logy”).",
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      "ruby": [
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          "冶",
          "や"
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    {
      "ipa": "[ja̠kʲĩŋɡa̠kɯ̟ᵝ]"
    }
  ],
  "word": "冶金学"
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      "ruby": [
        [
          "冶",
          "や"
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          "金",
          "きん"
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          "学",
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      "expansion": "冶(や)金(きん)学(がく) • (yakingaku)",
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      "ipa": "[ja̠kʲĩŋɡa̠kɯ̟ᵝ]"
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  "subsection": "noun",
  "title": "冶金学",
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