"Tyndall blue" meaning in English

{
  "etymology_text": "After John Tyndall, a 19th-century British physicist who first explained the effect and the resulting color.",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
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      "glosses": [
        "The bluish polarized light scattered in the Tyndall effect."
      ],
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        [
          "polarize",
          "polarize"
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        [
          "light",
          "light"
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        [
          "Tyndall effect",
          "Tyndall effect"
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        "John Tyndall"
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  "word": "Tyndall blue"
}

{
  "etymology_text": "After John Tyndall, a 19th-century British physicist who first explained the effect and the resulting color.",
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  "lang_code": "en",
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      "glosses": [
        "The bluish polarized light scattered in the Tyndall effect."
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          "light"
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}