"lx" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "linguistics",
        "3": "-x"
      },
      "expansion": "linguistics + -x",
      "name": "af"
    }
  ],
  "etymology_text": "linguistics + -x",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "lx (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "linguistics"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -x",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of linguistics."
      ],
      "id": "en-lx-en-noun-ioy-AeK8",
      "links": [
        [
          "linguistics",
          "linguistics#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "uncountable"
      ]
    }
  ],
  "word": "lx"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "linguistics",
        "3": "-x"
      },
      "expansion": "linguistics + -x",
      "name": "af"
    }
  ],
  "etymology_text": "linguistics + -x",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "lx (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "linguistics"
        }
      ],
      "categories": [
        "English abbreviations",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -x",
        "English uncountable nouns",
        "English words without vowels",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Abbreviation of linguistics."
      ],
      "links": [
        [
          "linguistics",
          "linguistics#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "uncountable"
      ]
    }
  ],
  "word": "lx"
}