"acra" meaning in English

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  "etymology_text": "From Ancient Greek ἀ̆κρᾰ (ăkră), probably back-formed from German Akren as this is more easily encountered and even the English is most likely found in books written by Germans.",
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          "text": "The principal differential diagnostic considerations in the case of nevi situated at the acra are atypical nevus and melanoma and, occasionally Spitz nevus/tumor.",
          "type": "quote"
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        {
          "ref": "2014 July 29, Sandra Ückert, Cold Application in Training & Competition: The Influence of Temperature on Your Athletic Performance, Meyer & Meyer Verlag, →ISBN, page 52:",
          "text": "The surface area to volume ratio requires that the surface temperature in the nearly cylinder-shaped body parts should be lower the smaller their radius is. Consequently skin temperatures drop toward the ends of the extremities. A quicker cooling of the acra compared to head or trunk also occurs.",
          "type": "quote"
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      ],
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        "The vascular areas of the body most removed from the heart."
      ],
      "id": "en-acra-en-noun-exn-bH5A",
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          "vascular",
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          "body"
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          "removed",
          "removed"
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          "heart",
          "heart"
        ]
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        "(anatomy, rare) The vascular areas of the body most removed from the heart."
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          "word": "acral"
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  "word": "acra"
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        {
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          "text": "The surface area to volume ratio requires that the surface temperature in the nearly cylinder-shaped body parts should be lower the smaller their radius is. Consequently skin temperatures drop toward the ends of the extremities. A quicker cooling of the acra compared to head or trunk also occurs.",
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  "title": "acra",
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