"Mallen streak" meaning in English

{
  "etymology_text": "Coined by Catherine Cookson in her Mallen trilogy, a series of books about a family named Mallen who all shared this trait.",
  "forms": [
    {
      "form": "Mallen streaks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Mallen streak (plural Mallen streaks)",
      "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"
        }
      ],
      "glosses": [
        "A streak of unusually coloured hair, typically white, which grows amidst normally colored hair."
      ],
      "id": "en-Mallen_streak-en-noun-yRSowxFB",
      "links": [
        [
          "streak",
          "streak"
        ]
      ],
      "related": [
        {
          "word": "poliosis"
        }
      ]
    }
  ],
  "word": "Mallen streak"
}

{
  "etymology_text": "Coined by Catherine Cookson in her Mallen trilogy, a series of books about a family named Mallen who all shared this trait.",
  "forms": [
    {
      "form": "Mallen streaks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Mallen streak (plural Mallen streaks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "poliosis"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A streak of unusually coloured hair, typically white, which grows amidst normally colored hair."
      ],
      "links": [
        [
          "streak",
          "streak"
        ]
      ]
    }
  ],
  "word": "Mallen streak"
}