"Nt" meaning in Translingual

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
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      "expansion": "Nt",
      "name": "head"
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  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Symbols for chemical elements",
          "parents": [
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
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          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "niton; Former name of Rn (“radon”)."
      ],
      "id": "en-Nt-mul-symbol-DA~66urs",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "niton",
          "niton#English"
        ],
        [
          "Rn",
          "Rn#English"
        ]
      ],
      "raw_glosses": [
        "(chemistry, obsolete) niton; Former name of Rn (“radon”)."
      ],
      "tags": [
        "obsolete"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "Nt"
}

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "Nt",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        "Symbols for chemical elements",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual symbols",
        "Translingual terms with obsolete senses"
      ],
      "glosses": [
        "niton; Former name of Rn (“radon”)."
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "niton",
          "niton#English"
        ],
        [
          "Rn",
          "Rn#English"
        ]
      ],
      "raw_glosses": [
        "(chemistry, obsolete) niton; Former name of Rn (“radon”)."
      ],
      "tags": [
        "obsolete"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "Nt"
}