"straylight" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "stray",
        "3": "light"
      },
      "expansion": "stray + light",
      "name": "compound"
    }
  ],
  "etymology_text": "stray + light",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "straylight (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"
        }
      ],
      "examples": [
        {
          "ref": "2010, Joseph Besharse, Reza Dana, Encyclopedia of the Eye, Volume 1",
          "text": "Within the eye, there are four major sources that contribute to the total amount of straylight: the cornea, the iris and sclera, the eye lens, and the fundus (see Figure 3).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Light in an optical system, which was not intended in the design."
      ],
      "id": "en-straylight-en-noun-YZYxal7l",
      "synonyms": [
        {
          "word": "stray light"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "straylight"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "stray",
        "3": "light"
      },
      "expansion": "stray + light",
      "name": "compound"
    }
  ],
  "etymology_text": "stray + light",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "straylight (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2010, Joseph Besharse, Reza Dana, Encyclopedia of the Eye, Volume 1",
          "text": "Within the eye, there are four major sources that contribute to the total amount of straylight: the cornea, the iris and sclera, the eye lens, and the fundus (see Figure 3).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Light in an optical system, which was not intended in the design."
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "stray light"
    }
  ],
  "word": "straylight"
}