"fairy butter" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "coordinate_terms": [
        {
          "word": "nun's butter"
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      "glosses": [
        "A food made from butter and egg yolks mixed with sugar and orange flower water."
      ],
      "id": "en-fairy_butter-en-noun-J09-m8UU",
      "links": [
        [
          "food",
          "food"
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        [
          "butter",
          "butter"
        ],
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          "egg",
          "egg"
        ],
        [
          "yolk",
          "yolk"
        ],
        [
          "sugar",
          "sugar"
        ],
        [
          "orange",
          "orange"
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        [
          "flower",
          "flower"
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          "water",
          "water"
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        "uncountable"
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          "ref": "1850, Thomas Keightley, The Fairy Mythology, London: H.G. Bohn, page 309:",
          "text": "\"A woman,\" he says, \"who had been in their society challenged one of the guests whom she espied in the market selling fairy-butter.\"",
          "type": "quotation"
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      ],
      "glosses": [
        "Certain gelatinous fungi, the tremellas."
      ],
      "id": "en-fairy_butter-en-noun-d8d6WAg7",
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        [
          "gelatinous",
          "gelatinous"
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          "fungi",
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          "tremella",
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        "(UK, dialect) Certain gelatinous fungi, the tremellas."
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          "word": "fairies' butter"
        }
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        "UK",
        "dialectal",
        "uncountable"
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  "word": "fairy butter"
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  "pos": "noun",
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      "glosses": [
        "A food made from butter and egg yolks mixed with sugar and orange flower water."
      ],
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          "butter",
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          "yolk",
          "yolk"
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          "sugar",
          "sugar"
        ],
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          "orange",
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          "flower",
          "flower"
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          "water",
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      "tags": [
        "uncountable"
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          "ref": "1850, Thomas Keightley, The Fairy Mythology, London: H.G. Bohn, page 309:",
          "text": "\"A woman,\" he says, \"who had been in their society challenged one of the guests whom she espied in the market selling fairy-butter.\"",
          "type": "quotation"
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      "glosses": [
        "Certain gelatinous fungi, the tremellas."
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      "links": [
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          "gelatinous",
          "gelatinous"
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          "fungi",
          "fungus"
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          "tremella",
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      "raw_glosses": [
        "(UK, dialect) Certain gelatinous fungi, the tremellas."
      ],
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        {
          "word": "fairies' butter"
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  "word": "fairy butter"
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