"grenz ray" meaning in English

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        "3": "Grenz",
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        "5": "border"
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      "expansion": "German Grenz (“border”)",
      "name": "bor"
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  ],
  "etymology_text": "From German Grenz (“border”) (since the effects were thought to be on the border between ultraviolet light and traditional X-rays) + ray.",
  "forms": [
    {
      "form": "grenz rays",
      "tags": [
        "plural"
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      "expansion": "grenz ray (plural grenz rays)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "An ultrasoft X-ray used in treating various skin diseases."
      ],
      "id": "en-grenz_ray-en-noun-eZNhI4Pt",
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          "ultrasoft",
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          "X-ray"
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          "skin",
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        [
          "disease",
          "disease"
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      ]
    }
  ],
  "word": "grenz ray"
}

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      "name": "bor"
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  ],
  "etymology_text": "From German Grenz (“border”) (since the effects were thought to be on the border between ultraviolet light and traditional X-rays) + ray.",
  "forms": [
    {
      "form": "grenz rays",
      "tags": [
        "plural"
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  "lang_code": "en",
  "pos": "noun",
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        "An ultrasoft X-ray used in treating various skin diseases."
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  "word": "grenz ray"
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