"mẫu âm" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "母音"
      },
      "expansion": "",
      "name": "etymid"
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    {
      "args": {
        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
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    {
      "args": {
        "1": "母音"
      },
      "expansion": "Sino-Vietnamese word from 母音",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 母音.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "mẫu âm",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mẫu âm",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
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          "name": "Sino-Vietnamese words",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Linguistics",
          "orig": "vi:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "vowel"
      ],
      "id": "en-mẫu_âm-vi-noun-WZgQacVq",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "vowel",
          "vowel"
        ]
      ],
      "raw_glosses": [
        "(dated, linguistics) vowel"
      ],
      "synonyms": [
        {
          "word": "nguyên âm"
        }
      ],
      "tags": [
        "dated"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[məw˦ˀ˥ ʔəm˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[məw˧˨ ʔəm˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[məw˨˩˦ ʔəm˧˧]",
      "note": "Saigon"
    }
  ],
  "word": "mẫu âm"
}

{
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        "2": "母音"
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      "args": {
        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "母音"
      },
      "expansion": "Sino-Vietnamese word from 母音",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 母音.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "mẫu âm",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mẫu âm",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Sino-Vietnamese words",
        "Vietnamese dated terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese terms with IPA pronunciation",
        "vi:Linguistics"
      ],
      "glosses": [
        "vowel"
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "vowel",
          "vowel"
        ]
      ],
      "raw_glosses": [
        "(dated, linguistics) vowel"
      ],
      "tags": [
        "dated"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[məw˦ˀ˥ ʔəm˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[məw˧˨ ʔəm˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[məw˨˩˦ ʔəm˧˧]",
      "note": "Saigon"
    }
  ],
  "synonyms": [
    {
      "word": "nguyên âm"
    }
  ],
  "word": "mẫu âm"
}