"Pr" meaning in Translingual

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "Pr",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "related": [
    {
      "_dis1": "0 0 0",
      "word": "|"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Symbols for chemical elements",
          "parents": [
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "49 5 46",
          "kind": "topical",
          "langcode": "mul",
          "name": "Lanthanide series chemical elements",
          "orig": "mul:Lanthanide series chemical elements",
          "parents": [
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Chemical symbol for praseodymium."
      ],
      "id": "en-Pr-mul-symbol-8PnHfLhG",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "praseodymium",
          "praseodymium#English"
        ]
      ],
      "raw_glosses": [
        "(chemistry) Chemical symbol for praseodymium."
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Mathematics",
          "orig": "mul:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Pr(B|A)=(Pr(A|B)·Pr(B))/(Pr(A))"
        }
      ],
      "glosses": [
        "probability"
      ],
      "id": "en-Pr-mul-symbol-OVX4~ZLN",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "probability",
          "probability"
        ]
      ],
      "raw_glosses": [
        "(mathematics) probability"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    },
    {
      "categories": [
        {
          "_dis": "14 6 80",
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "12 4 85",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "19 9 73",
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "49 5 46",
          "kind": "topical",
          "langcode": "mul",
          "name": "Lanthanide series chemical elements",
          "orig": "mul:Lanthanide series chemical elements",
          "parents": [
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Prandtl number"
      ],
      "id": "en-Pr-mul-symbol-~t2IAmvv",
      "links": [
        [
          "Prandtl number",
          "Prandtl number"
        ]
      ]
    }
  ],
  "word": "Pr"
}

{
  "categories": [
    "Pages with 3 entries",
    "Pages with entries",
    "Translingual entries with incorrect language header",
    "Translingual lemmas",
    "Translingual symbols",
    "mul:Lanthanide series chemical elements"
  ],
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "Pr",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "related": [
    {
      "word": "|"
    }
  ],
  "senses": [
    {
      "categories": [
        "Symbols for chemical elements"
      ],
      "glosses": [
        "Chemical symbol for praseodymium."
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "praseodymium",
          "praseodymium#English"
        ]
      ],
      "raw_glosses": [
        "(chemistry) Chemical symbol for praseodymium."
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    },
    {
      "categories": [
        "mul:Mathematics"
      ],
      "examples": [
        {
          "text": "Pr(B|A)=(Pr(A|B)·Pr(B))/(Pr(A))"
        }
      ],
      "glosses": [
        "probability"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "probability",
          "probability"
        ]
      ],
      "raw_glosses": [
        "(mathematics) probability"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    },
    {
      "glosses": [
        "Prandtl number"
      ],
      "links": [
        [
          "Prandtl number",
          "Prandtl number"
        ]
      ]
    }
  ],
  "word": "Pr"
}