"quark star" meaning in English

{
  "forms": [
    {
      "form": "quark stars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "quark star (plural quark stars)",
      "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": "topical",
          "langcode": "en",
          "name": "Stars",
          "orig": "en:Stars",
          "parents": [
            "Celestial bodies",
            "Space",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A hypothetical exotic star composed of quark-gluon plasma."
      ],
      "hyponyms": [
        {
          "word": "strange quark star"
        },
        {
          "word": "strange star"
        }
      ],
      "id": "en-quark_star-en-noun-1w6vZ0PV",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "hypothetical",
          "hypothetical"
        ],
        [
          "exotic star",
          "exotic star"
        ],
        [
          "quark-gluon plasma",
          "quark-gluon plasma"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A hypothetical exotic star composed of quark-gluon plasma."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "en:quark star"
      ]
    }
  ],
  "word": "quark star"
}

{
  "forms": [
    {
      "form": "quark stars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "quark star (plural quark stars)",
      "name": "en-noun"
    }
  ],
  "hyponyms": [
    {
      "word": "strange quark star"
    },
    {
      "word": "strange star"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Stars"
      ],
      "glosses": [
        "A hypothetical exotic star composed of quark-gluon plasma."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "hypothetical",
          "hypothetical"
        ],
        [
          "exotic star",
          "exotic star"
        ],
        [
          "quark-gluon plasma",
          "quark-gluon plasma"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A hypothetical exotic star composed of quark-gluon plasma."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "en:quark star"
      ]
    }
  ],
  "word": "quark star"
}