"ㆁ" meaning in Middle Korean

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ko",
            "2": "ㅇ",
            "pos": "also represents lack of a consonant",
            "tr": "–, ng"
          },
          "expansion": "Korean: ㅇ (–, ng, also represents lack of a consonant)",
          "name": "desc"
        },
        {
          "args": {
            "1": "merged with <i class=\"Kore mention\" lang=\"okm\">ㅇ</i>"
          },
          "expansion": "(merged with ㅇ)",
          "name": "q"
        }
      ],
      "text": "Korean: ㅇ (–, ng, also represents lack of a consonant) (merged with ㅇ)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ko",
        "2": "ㅇ",
        "tr": "–, ng"
      },
      "expansion": "Korean ㅇ (–, ng)",
      "name": "cog"
    }
  ],
  "etymology_text": "From ㅇ (represents lack of a consonant), with an additional stroke from ㄱ (k) to represent a velar sound. See the Etymology section on modern Korean ㅇ (–, ng) for the motivations of this.",
  "forms": [
    {
      "form": "ng",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "okm",
        "2": "letter",
        "tr": "ng"
      },
      "expansion": "ㆁ (ng)",
      "name": "head"
    }
  ],
  "lang": "Middle Korean",
  "lang_code": "okm",
  "pos": "character",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Korean terms with non-redundant manual transliterations",
          "parents": [
            "Terms with non-redundant manual transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Middle Korean entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Middle Korean terms with non-redundant manual transliterations",
          "parents": [
            "Terms with non-redundant manual transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Middle Korean terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A letter representing the velar nasal, /ŋ/. Called 옛이응 (yesieung) in Modern Korean."
      ],
      "id": "en-ㆁ-okm-character-CTxrrr5F",
      "links": [
        [
          "옛이응",
          "옛이응#Korean"
        ]
      ],
      "tags": [
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ŋ/"
    }
  ],
  "word": "ㆁ"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ko",
            "2": "ㅇ",
            "pos": "also represents lack of a consonant",
            "tr": "–, ng"
          },
          "expansion": "Korean: ㅇ (–, ng, also represents lack of a consonant)",
          "name": "desc"
        },
        {
          "args": {
            "1": "merged with <i class=\"Kore mention\" lang=\"okm\">ㅇ</i>"
          },
          "expansion": "(merged with ㅇ)",
          "name": "q"
        }
      ],
      "text": "Korean: ㅇ (–, ng, also represents lack of a consonant) (merged with ㅇ)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ko",
        "2": "ㅇ",
        "tr": "–, ng"
      },
      "expansion": "Korean ㅇ (–, ng)",
      "name": "cog"
    }
  ],
  "etymology_text": "From ㅇ (represents lack of a consonant), with an additional stroke from ㄱ (k) to represent a velar sound. See the Etymology section on modern Korean ㅇ (–, ng) for the motivations of this.",
  "forms": [
    {
      "form": "ng",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "okm",
        "2": "letter",
        "tr": "ng"
      },
      "expansion": "ㆁ (ng)",
      "name": "head"
    }
  ],
  "lang": "Middle Korean",
  "lang_code": "okm",
  "pos": "character",
  "senses": [
    {
      "categories": [
        "Korean terms with non-redundant manual transliterations",
        "Middle Korean entries with incorrect language header",
        "Middle Korean lemmas",
        "Middle Korean letters",
        "Middle Korean terms with IPA pronunciation",
        "Middle Korean terms with non-redundant manual transliterations",
        "Middle Korean terms with redundant transliterations"
      ],
      "glosses": [
        "A letter representing the velar nasal, /ŋ/. Called 옛이응 (yesieung) in Modern Korean."
      ],
      "links": [
        [
          "옛이응",
          "옛이응#Korean"
        ]
      ],
      "tags": [
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ŋ/"
    }
  ],
  "word": "ㆁ"
}