"eigengrau" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "de",
        "2": "Eigengrau",
        "3": "",
        "4": "intrinsic grey"
      },
      "expansion": "German Eigengrau (“intrinsic grey”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From German Eigengrau (“intrinsic grey”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "eigengrau (uncountable)",
      "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"
        }
      ],
      "glosses": [
        "The dark grey colour seen by the eyes in perfect darkness as a result of signals from the optic nerves."
      ],
      "id": "en-eigengrau-en-noun-BopAsnQp",
      "synonyms": [
        {
          "word": "Eigenlicht"
        },
        {
          "word": "brain gray"
        },
        {
          "word": "brain grey"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "wikipedia": [
        "eigengrau"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈaɪɡənɡɹaʊ/"
    }
  ],
  "word": "eigengrau"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "de",
        "2": "Eigengrau",
        "3": "",
        "4": "intrinsic grey"
      },
      "expansion": "German Eigengrau (“intrinsic grey”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From German Eigengrau (“intrinsic grey”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "eigengrau (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 3-syllable words",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with IPA pronunciation",
        "English uncountable nouns"
      ],
      "glosses": [
        "The dark grey colour seen by the eyes in perfect darkness as a result of signals from the optic nerves."
      ],
      "tags": [
        "uncountable"
      ],
      "wikipedia": [
        "eigengrau"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈaɪɡənɡɹaʊ/"
    }
  ],
  "synonyms": [
    {
      "word": "Eigenlicht"
    },
    {
      "word": "brain gray"
    },
    {
      "word": "brain grey"
    }
  ],
  "word": "eigengrau"
}