"rex" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "rēx",
        "4": "",
        "5": "king"
      },
      "expansion": "Latin rēx (“king”)",
      "name": "uder"
    },
    {
      "args": {
        "1": "en",
        "2": "rajah",
        "3": "roy"
      },
      "expansion": "Doublet of rajah and roy",
      "name": "doublet"
    }
  ],
  "etymology_text": "From the Latin rēx (“king”), referring originally to rabbits of the Belgian \"castorrex\" breed, so named because their fur was similar to that of beavers. Entered English around 1920. Doublet of rajah and roy.",
  "forms": [
    {
      "form": "rexes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rex (plural rexes)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Hair",
          "orig": "en:Hair",
          "parents": [
            "Body parts",
            "Body",
            "Anatomy",
            "Human",
            "Biology",
            "Medicine",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "Cornish Rex"
        },
        {
          "word": "Devon Rex"
        },
        {
          "word": "German Rex"
        },
        {
          "word": "Oregon Rex"
        },
        {
          "word": "Selkirk Rex"
        }
      ],
      "glosses": [
        "An animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking."
      ],
      "id": "en-rex-en-noun-GN6Anbf2",
      "links": [
        [
          "animal",
          "animal"
        ],
        [
          "genetic",
          "genetic"
        ],
        [
          "recessive",
          "recessive"
        ],
        [
          "variation",
          "variation"
        ],
        [
          "guard hair",
          "guard hair"
        ]
      ],
      "related": [
        {
          "word": "Rex"
        },
        {
          "word": "Bantersaurus Rex"
        },
        {
          "word": "rex-pat"
        },
        {
          "word": "rex sacrorum"
        },
        {
          "word": "T. rex"
        },
        {
          "word": "Tyrannosaurus rex"
        }
      ],
      "wikipedia": [
        "Rex mutation"
      ]
    }
  ],
  "word": "rex"
}

{
  "derived": [
    {
      "word": "Cornish Rex"
    },
    {
      "word": "Devon Rex"
    },
    {
      "word": "German Rex"
    },
    {
      "word": "Oregon Rex"
    },
    {
      "word": "Selkirk Rex"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "rēx",
        "4": "",
        "5": "king"
      },
      "expansion": "Latin rēx (“king”)",
      "name": "uder"
    },
    {
      "args": {
        "1": "en",
        "2": "rajah",
        "3": "roy"
      },
      "expansion": "Doublet of rajah and roy",
      "name": "doublet"
    }
  ],
  "etymology_text": "From the Latin rēx (“king”), referring originally to rabbits of the Belgian \"castorrex\" breed, so named because their fur was similar to that of beavers. Entered English around 1920. Doublet of rajah and roy.",
  "forms": [
    {
      "form": "rexes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rex (plural rexes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Rex"
    },
    {
      "word": "Bantersaurus Rex"
    },
    {
      "word": "rex-pat"
    },
    {
      "word": "rex sacrorum"
    },
    {
      "word": "T. rex"
    },
    {
      "word": "Tyrannosaurus rex"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English doublets",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English nouns",
        "English terms derived from Latin",
        "English undefined derivations",
        "en:Hair"
      ],
      "glosses": [
        "An animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking."
      ],
      "links": [
        [
          "animal",
          "animal"
        ],
        [
          "genetic",
          "genetic"
        ],
        [
          "recessive",
          "recessive"
        ],
        [
          "variation",
          "variation"
        ],
        [
          "guard hair",
          "guard hair"
        ]
      ],
      "wikipedia": [
        "Rex mutation"
      ]
    }
  ],
  "word": "rex"
}