"eigenclass" meaning in English

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  "etymology_text": "From eigen- + class.",
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      "form": "eigenclasses",
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          "text": "Singleton methods in Ruby live in a special, hidden class called the singleton class (it used to be referred to as the eigenclass, but singleton class is the current term).https://codequizzes.wordpress.com/2014/04/11/singleton-classes-in-ruby-aka-eigenclasses/",
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        "A hidden class associated with each specific instance of another class."
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        "(object-oriented programming) A hidden class associated with each specific instance of another class."
      ]
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  "word": "eigenclass"
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  ],
  "etymology_text": "From eigen- + class.",
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          "text": "Singleton methods in Ruby live in a special, hidden class called the singleton class (it used to be referred to as the eigenclass, but singleton class is the current term).https://codequizzes.wordpress.com/2014/04/11/singleton-classes-in-ruby-aka-eigenclasses/",
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        "(object-oriented programming) A hidden class associated with each specific instance of another class."
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