"◌⃗" meaning in Translingual

{
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "character",
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
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          "kind": "other",
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          "parents": [],
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        {
          "kind": "topical",
          "name": "Translingual diacritical marks",
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        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Linear algebra",
          "orig": "mul:Linear algebra",
          "parents": [
            "Algebra",
            "Mathematics",
            "Formal sciences",
            "Sciences",
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        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Physics",
          "orig": "mul:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "a⃗ + (-a⃗) = 0"
        },
        {
          "text": "Coordinate term: ◌̂"
        }
      ],
      "glosses": [
        "Denotes a vector quantity."
      ],
      "id": "en-◌⃗-mul-character-TPUXDzHn",
      "links": [
        [
          "linear algebra",
          "linear algebra"
        ],
        [
          "physics",
          "physics"
        ],
        [
          "vector",
          "vector#English"
        ]
      ],
      "raw_glosses": [
        "(linear algebra, physics) Denotes a vector quantity."
      ],
      "tags": [
        "diacritic"
      ],
      "topics": [
        "linear-algebra",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "physics",
        "sciences"
      ]
    }
  ],
  "word": "◌⃗"
}

{
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  "lang_code": "mul",
  "pos": "character",
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        "mul:Linear algebra",
        "mul:Physics"
      ],
      "examples": [
        {
          "text": "a⃗ + (-a⃗) = 0"
        },
        {
          "text": "Coordinate term: ◌̂"
        }
      ],
      "glosses": [
        "Denotes a vector quantity."
      ],
      "links": [
        [
          "linear algebra",
          "linear algebra"
        ],
        [
          "physics",
          "physics"
        ],
        [
          "vector",
          "vector#English"
        ]
      ],
      "raw_glosses": [
        "(linear algebra, physics) Denotes a vector quantity."
      ],
      "tags": [
        "diacritic"
      ],
      "topics": [
        "linear-algebra",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "physics",
        "sciences"
      ]
    }
  ],
  "word": "◌⃗"
}