"prickly heat" meaning in English

{
  "etymology_text": "1730-40, Americanism.",
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      "expansion": "prickly heat (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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              21,
              33
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          "ref": "1889, Rudyard Kipling, “The Hill of Illusion”, in Under the Deodars, Boston: The Greenock Press, published 1899, page 82:",
          "text": "My poor boy, how the prickly heat has marked your forehead! Have you ever tried sulphate of copper in water?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "miliaria"
      ],
      "id": "en-prickly_heat-en-noun-5axaYP8x",
      "links": [
        [
          "miliaria",
          "miliaria"
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      ],
      "synonyms": [
        {
          "word": "heat rash"
        },
        {
          "word": "sweat rash"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈpɹɪk li ˈhit/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "prickly heat"
}

{
  "etymology_text": "1730-40, Americanism.",
  "head_templates": [
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      "expansion": "prickly heat (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "ref": "1889, Rudyard Kipling, “The Hill of Illusion”, in Under the Deodars, Boston: The Greenock Press, published 1899, page 82:",
          "text": "My poor boy, how the prickly heat has marked your forehead! Have you ever tried sulphate of copper in water?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "miliaria"
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    {
      "ipa": "/ˈpɹɪk li ˈhit/",
      "tags": [
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  "synonyms": [
    {
      "word": "heat rash"
    },
    {
      "word": "sweat rash"
    }
  ],
  "word": "prickly heat"
}