"darwin" meaning in English

{
  "etymology_text": "Named after Charles Darwin, coined by J.B.S. Haldane in 1949.",
  "forms": [
    {
      "form": "darwins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "darwin (plural darwins)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Evolutionary theory",
          "orig": "en:Evolutionary theory",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Time",
          "orig": "en:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Units of measure",
          "orig": "en:Units of measure",
          "parents": [
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "tags": [
            "abbreviation"
          ],
          "word": "d"
        },
        {
          "word": "millidarwin"
        }
      ],
      "examples": [
        {
          "ref": "1999, J. William Schopf, Evolution!: Facts and Fallacies, page 50:",
          "text": "One darwin (d) equals the rate of evolution that would produce a change in size by a factor of approximately 2.7 in one million years.",
          "type": "quote"
        },
        {
          "ref": "2003, Donald Mitchell, The 2,000 Percent Solution, page 243:",
          "text": "The rate of evolutionary change in a species' wing or leg or beak (remember Darwin's finches mentioned in Chapter 1?) is assessed in degree-of-physical-change units called darwins.",
          "type": "quote"
        },
        {
          "ref": "2010, Sahotra Sarkar, Anya Plutynski, A Companion to the Philosophy of Biology, page 177:",
          "text": "For instance, gradual change is relatively common in vertebrates (about .08 darwins), though some rapidly evolving vertebrates lineages show rates as high as 10 darwins, over short periods.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A unit of evolutionary change in evolutionary biology."
      ],
      "id": "en-darwin-en-noun-pz2HWW0P",
      "links": [
        [
          "unit",
          "unit"
        ],
        [
          "evolutionary",
          "evolutionary"
        ],
        [
          "evolutionary biology",
          "evolutionary biology"
        ]
      ],
      "related": [
        {
          "word": "Darwin"
        }
      ],
      "wikipedia": [
        "Charles Darwin",
        "J.B.S. Haldane"
      ]
    }
  ],
  "word": "darwin"
}

{
  "derived": [
    {
      "tags": [
        "abbreviation"
      ],
      "word": "d"
    },
    {
      "word": "millidarwin"
    }
  ],
  "etymology_text": "Named after Charles Darwin, coined by J.B.S. Haldane in 1949.",
  "forms": [
    {
      "form": "darwins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "darwin (plural darwins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Darwin"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned",
        "en:Evolutionary theory",
        "en:Time",
        "en:Units of measure"
      ],
      "examples": [
        {
          "ref": "1999, J. William Schopf, Evolution!: Facts and Fallacies, page 50:",
          "text": "One darwin (d) equals the rate of evolution that would produce a change in size by a factor of approximately 2.7 in one million years.",
          "type": "quote"
        },
        {
          "ref": "2003, Donald Mitchell, The 2,000 Percent Solution, page 243:",
          "text": "The rate of evolutionary change in a species' wing or leg or beak (remember Darwin's finches mentioned in Chapter 1?) is assessed in degree-of-physical-change units called darwins.",
          "type": "quote"
        },
        {
          "ref": "2010, Sahotra Sarkar, Anya Plutynski, A Companion to the Philosophy of Biology, page 177:",
          "text": "For instance, gradual change is relatively common in vertebrates (about .08 darwins), though some rapidly evolving vertebrates lineages show rates as high as 10 darwins, over short periods.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A unit of evolutionary change in evolutionary biology."
      ],
      "links": [
        [
          "unit",
          "unit"
        ],
        [
          "evolutionary",
          "evolutionary"
        ],
        [
          "evolutionary biology",
          "evolutionary biology"
        ]
      ],
      "wikipedia": [
        "Charles Darwin",
        "J.B.S. Haldane"
      ]
    }
  ],
  "word": "darwin"
}