"ULRR" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "ULRR",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "upper limit of reference range"
        }
      ],
      "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": "Biochemistry",
          "orig": "en:Biochemistry",
          "parents": [
            "Biology",
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of upper limit of reference range."
      ],
      "id": "en-ULRR-en-noun-I9rtPXqS",
      "links": [
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "upper",
          "upper#English"
        ],
        [
          "limit",
          "limit#English"
        ],
        [
          "reference",
          "reference#English"
        ],
        [
          "range",
          "range#English"
        ]
      ],
      "raw_glosses": [
        "(biochemistry) Initialism of upper limit of reference range."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "ULRR"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "ULRR",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "upper limit of reference range"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "en:Biochemistry"
      ],
      "glosses": [
        "Initialism of upper limit of reference range."
      ],
      "links": [
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "upper",
          "upper#English"
        ],
        [
          "limit",
          "limit#English"
        ],
        [
          "reference",
          "reference#English"
        ],
        [
          "range",
          "range#English"
        ]
      ],
      "raw_glosses": [
        "(biochemistry) Initialism of upper limit of reference range."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "ULRR"
}