"ダウンクォーク" meaning in Japanese

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  "etymology_text": "From English down quark.",
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  "word": "ダウンクォーク"
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      "expansion": "English down quark",
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  ],
  "etymology_text": "From English down quark.",
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    {
      "form": "daunkwōku",
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      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
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  "word": "ダウンクォーク"
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  "subsection": "noun",
  "title": "ダウンクォーク",
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