"thirder" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "third",
        "3": "er"
      },
      "expansion": "third + -er",
      "name": "suf"
    }
  ],
  "etymology_text": "From third + -er.",
  "forms": [
    {
      "form": "thirders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thirder (plural thirders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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        {
          "kind": "other",
          "name": "English terms suffixed with -er",
          "parents": [],
          "source": "w"
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        {
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Decision theory",
          "orig": "en:Decision theory",
          "parents": [
            "Epistemology",
            "Probability theory",
            "Philosophy",
            "Mathematical analysis",
            "All topics",
            "Mathematics",
            "Fundamental",
            "Formal sciences",
            "Sciences"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Coordinate term: halfer"
        }
      ],
      "glosses": [
        "With regard to the Sleeping Beauty problem: one who argues that the probability of heads is 1/3."
      ],
      "id": "en-thirder-en-noun-svKnu0BY",
      "links": [
        [
          "decision theory",
          "decision theory"
        ],
        [
          "Sleeping Beauty problem",
          "Sleeping Beauty problem"
        ],
        [
          "probability",
          "probability"
        ],
        [
          "heads",
          "heads"
        ]
      ],
      "qualifier": "decision theory",
      "raw_glosses": [
        "(decision theory) With regard to the Sleeping Beauty problem: one who argues that the probability of heads is 1/3."
      ]
    }
  ],
  "word": "thirder"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "third",
        "3": "er"
      },
      "expansion": "third + -er",
      "name": "suf"
    }
  ],
  "etymology_text": "From third + -er.",
  "forms": [
    {
      "form": "thirders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thirder (plural thirders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "English countable nouns",
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      "examples": [
        {
          "text": "Coordinate term: halfer"
        }
      ],
      "glosses": [
        "With regard to the Sleeping Beauty problem: one who argues that the probability of heads is 1/3."
      ],
      "links": [
        [
          "decision theory",
          "decision theory"
        ],
        [
          "Sleeping Beauty problem",
          "Sleeping Beauty problem"
        ],
        [
          "probability",
          "probability"
        ],
        [
          "heads",
          "heads"
        ]
      ],
      "qualifier": "decision theory",
      "raw_glosses": [
        "(decision theory) With regard to the Sleeping Beauty problem: one who argues that the probability of heads is 1/3."
      ]
    }
  ],
  "word": "thirder"
}