"wt." meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "wt.",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "weight"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "at. wt."
        },
        {
          "word": "dr. wt."
        },
        {
          "word": "gr. wt."
        },
        {
          "word": "mol. wt."
        },
        {
          "word": "net wt."
        }
      ],
      "glosses": [
        "Abbreviation of weight."
      ],
      "id": "en-wt.-en-noun-rtKff4VW",
      "links": [
        [
          "weight",
          "weight#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "wt."
}

{
  "derived": [
    {
      "word": "at. wt."
    },
    {
      "word": "dr. wt."
    },
    {
      "word": "gr. wt."
    },
    {
      "word": "mol. wt."
    },
    {
      "word": "net wt."
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "wt.",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "weight"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms spelled with .",
        "English words without vowels"
      ],
      "glosses": [
        "Abbreviation of weight."
      ],
      "links": [
        [
          "weight",
          "weight#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "wt."
}