"◌́" meaning in Russian

{
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "character",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Russian 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": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian terms in nonstandard scripts",
          "parents": [
            "Terms in nonstandard scripts",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ru",
          "name": "Lexicography",
          "orig": "ru:Lexicography",
          "parents": [
            "Linguistics",
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "stressed-syllable indicator"
      ],
      "id": "en-◌́-ru-character-u6BFcnEd",
      "links": [
        [
          "lexicography",
          "lexicography"
        ]
      ],
      "raw_glosses": [
        "(lexicography) stressed-syllable indicator"
      ],
      "related": [
        {
          "roman": "akút",
          "tags": [
            "masculine"
          ],
          "word": "аку́т"
        }
      ],
      "tags": [
        "diacritic"
      ],
      "topics": [
        "human-sciences",
        "lexicography",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "word": "◌́"
}

{
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "character",
  "related": [
    {
      "roman": "akút",
      "tags": [
        "masculine"
      ],
      "word": "аку́т"
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian diacritical marks",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian terms in nonstandard scripts",
        "ru:Lexicography"
      ],
      "glosses": [
        "stressed-syllable indicator"
      ],
      "links": [
        [
          "lexicography",
          "lexicography"
        ]
      ],
      "raw_glosses": [
        "(lexicography) stressed-syllable indicator"
      ],
      "tags": [
        "diacritic"
      ],
      "topics": [
        "human-sciences",
        "lexicography",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "word": "◌́"
}