"c̄" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "undefined derivations"
      },
      "expansion": "",
      "name": "cln"
    },
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "cum"
      },
      "expansion": "Latin cum",
      "name": "uder"
    }
  ],
  "etymology_text": "Abbreviation of Latin cum",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositions",
        "head": ""
      },
      "expansion": "c̄",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "c̄",
      "name": "en-prep"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English prepositions",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Medicine",
          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "With."
      ],
      "id": "en-c̄-en-prep-Rtp~X9Bj",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "With",
          "with"
        ]
      ],
      "raw_glosses": [
        "(medicine) With."
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "c̄"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "undefined derivations"
      },
      "expansion": "",
      "name": "cln"
    },
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "cum"
      },
      "expansion": "Latin cum",
      "name": "uder"
    }
  ],
  "etymology_text": "Abbreviation of Latin cum",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositions",
        "head": ""
      },
      "expansion": "c̄",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "c̄",
      "name": "en-prep"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "English lemmas",
        "English prepositions",
        "English terms derived from Latin",
        "English terms spelled with ◌̄",
        "English undefined derivations",
        "en:Medicine"
      ],
      "glosses": [
        "With."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "With",
          "with"
        ]
      ],
      "raw_glosses": [
        "(medicine) With."
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "c̄"
}