"◌̀" meaning in Catalan

{
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "character",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Catalan diacritical marks",
          "parents": [
            "Diacritical marks",
            "Letters, symbols, and punctuation",
            "Symbols",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Catalan terms in nonstandard scripts",
          "parents": [
            "Terms in nonstandard scripts",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Catalan terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A diacritical mark of the Latin script, called accent greu (“grave accent”) in Catalan, and found on À/à, È/è and Ò/ò."
      ],
      "id": "en-◌̀-ca-character-BYxPIpMf",
      "links": [
        [
          "diacritical mark",
          "diacritical mark"
        ],
        [
          "accent greu",
          "accent greu#Catalan"
        ],
        [
          "À",
          "À#Catalan"
        ],
        [
          "à",
          "à#Catalan"
        ],
        [
          "È",
          "È#Catalan"
        ],
        [
          "è",
          "è#Catalan"
        ],
        [
          "Ò",
          "Ò#Catalan"
        ],
        [
          "ò",
          "ò#Catalan"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    }
  ],
  "word": "◌̀"
}

{
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "character",
  "senses": [
    {
      "categories": [
        "Catalan diacritical marks",
        "Catalan entries with incorrect language header",
        "Catalan lemmas",
        "Catalan terms in nonstandard scripts",
        "Catalan terms with redundant script codes"
      ],
      "glosses": [
        "A diacritical mark of the Latin script, called accent greu (“grave accent”) in Catalan, and found on À/à, È/è and Ò/ò."
      ],
      "links": [
        [
          "diacritical mark",
          "diacritical mark"
        ],
        [
          "accent greu",
          "accent greu#Catalan"
        ],
        [
          "À",
          "À#Catalan"
        ],
        [
          "à",
          "à#Catalan"
        ],
        [
          "È",
          "È#Catalan"
        ],
        [
          "è",
          "è#Catalan"
        ],
        [
          "Ò",
          "Ò#Catalan"
        ],
        [
          "ò",
          "ò#Catalan"
        ]
      ],
      "tags": [
        "diacritic"
      ]
    }
  ],
  "word": "◌̀"
}