"X chromosome" meaning in English

{
  "etymology_text": "Named by Hermann Henking in 1890 from x (signifying the unknown) due to some baffling properties he had observed. The brief resemblance in the appearance of the X and Y chromosomes to the letters \"X\" and \"Y\" respectively during cell division is entirely coincidental.",
  "forms": [
    {
      "form": "X chromosomes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "X chromosome (plural X chromosomes)",
      "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": "Genetics",
          "orig": "en:Genetics",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A mammalian sex chromosome. Cells of females have a pair of X chromosomes while cells of males have an X and a Y."
      ],
      "id": "en-X_chromosome-en-noun-Z7X09uhc",
      "links": [
        [
          "genetics",
          "genetics"
        ],
        [
          "mammalian",
          "mammalian"
        ],
        [
          "sex chromosome",
          "sex chromosome"
        ]
      ],
      "raw_glosses": [
        "(genetics) A mammalian sex chromosome. Cells of females have a pair of X chromosomes while cells of males have an X and a Y."
      ],
      "related": [
        {
          "word": "X-linked trait"
        },
        {
          "word": "Y chromosome"
        }
      ],
      "synonyms": [
        {
          "word": "X-chromosome"
        }
      ],
      "topics": [
        "biology",
        "genetics",
        "medicine",
        "natural-sciences",
        "sciences"
      ],
      "translations": [
        {
          "code": "et",
          "lang": "Estonian",
          "sense": "a mammalian sex chromosome",
          "word": "X-kromosoom"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "a mammalian sex chromosome",
          "word": "X-kromosomi"
        },
        {
          "code": "is",
          "lang": "Icelandic",
          "sense": "a mammalian sex chromosome",
          "tags": [
            "masculine"
          ],
          "word": "X-litningur"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "sense": "a mammalian sex chromosome",
          "tags": [
            "masculine"
          ],
          "word": "X-chrómasóm"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "a mammalian sex chromosome",
          "tags": [
            "masculine"
          ],
          "word": "cromozom X"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "a mammalian sex chromosome",
          "tags": [
            "common-gender"
          ],
          "word": "X-kromosom"
        }
      ],
      "wikipedia": [
        "X chromosome"
      ]
    }
  ],
  "word": "X chromosome"
}

{
  "etymology_text": "Named by Hermann Henking in 1890 from x (signifying the unknown) due to some baffling properties he had observed. The brief resemblance in the appearance of the X and Y chromosomes to the letters \"X\" and \"Y\" respectively during cell division is entirely coincidental.",
  "forms": [
    {
      "form": "X chromosomes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "X chromosome (plural X chromosomes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "X-linked trait"
    },
    {
      "word": "Y chromosome"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Genetics"
      ],
      "glosses": [
        "A mammalian sex chromosome. Cells of females have a pair of X chromosomes while cells of males have an X and a Y."
      ],
      "links": [
        [
          "genetics",
          "genetics"
        ],
        [
          "mammalian",
          "mammalian"
        ],
        [
          "sex chromosome",
          "sex chromosome"
        ]
      ],
      "raw_glosses": [
        "(genetics) A mammalian sex chromosome. Cells of females have a pair of X chromosomes while cells of males have an X and a Y."
      ],
      "topics": [
        "biology",
        "genetics",
        "medicine",
        "natural-sciences",
        "sciences"
      ],
      "wikipedia": [
        "X chromosome"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "X-chromosome"
    }
  ],
  "translations": [
    {
      "code": "et",
      "lang": "Estonian",
      "sense": "a mammalian sex chromosome",
      "word": "X-kromosoom"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "a mammalian sex chromosome",
      "word": "X-kromosomi"
    },
    {
      "code": "is",
      "lang": "Icelandic",
      "sense": "a mammalian sex chromosome",
      "tags": [
        "masculine"
      ],
      "word": "X-litningur"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "a mammalian sex chromosome",
      "tags": [
        "masculine"
      ],
      "word": "X-chrómasóm"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "a mammalian sex chromosome",
      "tags": [
        "masculine"
      ],
      "word": "cromozom X"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "a mammalian sex chromosome",
      "tags": [
        "common-gender"
      ],
      "word": "X-kromosom"
    }
  ],
  "word": "X chromosome"
}