green-beard effect in English

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{
  "etymology_text": "From a hypothetical example used in Richard Dawkins' book The Selfish Gene (1976), whereby a person with a green beard acts altruistically towards other people with green beards.",
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      "glosses": [
        "A hypothesis in evolutionary biology that explains selective altruism among individuals of a species, involving preferential treatment of individuals with certain characteristics."
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        "(biology) A hypothesis in evolutionary biology that explains selective altruism among individuals of a species, involving preferential treatment of individuals with certain characteristics."
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "word": "green-beard effect"
}

[Show JSON for raw wiktextract data ▼] [Hide JSON for raw wiktextract data ▲]

{
  "etymology_text": "From a hypothetical example used in Richard Dawkins' book The Selfish Gene (1976), whereby a person with a green beard acts altruistically towards other people with green beards.",
  "head_templates": [
    {
      "args": {},
      "expansion": "green-beard effect",
      "name": "en-proper noun"
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  "lang_code": "en",
  "pos": "name",
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        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English uncountable nouns",
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        "en:Biology"
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      "glosses": [
        "A hypothesis in evolutionary biology that explains selective altruism among individuals of a species, involving preferential treatment of individuals with certain characteristics."
      ],
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "selective",
          "selective"
        ],
        [
          "altruism",
          "altruism"
        ],
        [
          "species",
          "species"
        ],
        [
          "preferential",
          "preferential"
        ],
        [
          "treatment",
          "treatment"
        ],
        [
          "characteristic",
          "characteristic"
        ]
      ],
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        "(biology) A hypothesis in evolutionary biology that explains selective altruism among individuals of a species, involving preferential treatment of individuals with certain characteristics."
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "word": "green-beard effect"
}

This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2025-01-31 from the enwiktionary dump dated 2025-01-20 using wiktextract (bcd5c38 and 9dbd323). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

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"green-beard effect" meaning in English

Proper name