"群速度" meaning in Chinese

{
  "forms": [
    {
      "form": "羣速度",
      "raw_tags": [
        "Traditional Chinese"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "zh",
        "2": "noun"
      },
      "expansion": "群速度",
      "name": "head"
    }
  ],
  "lang": "Chinese",
  "lang_code": "zh",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Chinese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "zh",
          "name": "Physics",
          "orig": "zh:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "group velocity"
      ],
      "id": "en-群速度-zh-noun-msG0UuaS",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "group velocity",
          "group velocity"
        ]
      ],
      "raw_glosses": [
        "(physics) group velocity"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "sounds": [
    {
      "tags": [
        "Mandarin",
        "Pinyin"
      ],
      "zh-pron": "qúnsùdù"
    },
    {
      "tags": [
        "Mandarin",
        "bopomofo"
      ],
      "zh-pron": "ㄑㄩㄣˊ ㄙㄨˋ ㄉㄨˋ"
    },
    {
      "tags": [
        "Hanyu-Pinyin",
        "Mandarin"
      ],
      "zh-pron": "qúnsùdù"
    },
    {
      "tags": [
        "Mandarin",
        "Tongyong-Pinyin"
      ],
      "zh-pron": "cyúnsùdù"
    },
    {
      "tags": [
        "Mandarin",
        "Wade-Giles"
      ],
      "zh-pron": "chʻün²-su⁴-tu⁴"
    },
    {
      "tags": [
        "Mandarin",
        "Yale"
      ],
      "zh-pron": "chyún-sù-dù"
    },
    {
      "tags": [
        "Gwoyeu-Romatsyh",
        "Mandarin"
      ],
      "zh-pron": "chyunsuhduh"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "цюньсуду"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "cjunʹsudu"
    },
    {
      "ipa": "/t͡ɕʰyn³⁵ su⁵¹⁻⁵³ tu⁵¹/",
      "tags": [
        "Mandarin",
        "Sinological-IPA"
      ]
    },
    {
      "ipa": "/t͡ɕʰyn³⁵ su⁵¹⁻⁵³ tu⁵¹/"
    }
  ],
  "word": "群速度"
}

{
  "forms": [
    {
      "form": "羣速度",
      "raw_tags": [
        "Traditional Chinese"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "zh",
        "2": "noun"
      },
      "expansion": "群速度",
      "name": "head"
    }
  ],
  "lang": "Chinese",
  "lang_code": "zh",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Chinese entries with incorrect language header",
        "Chinese lemmas",
        "Chinese nouns",
        "Chinese terms spelled with 度",
        "Chinese terms spelled with 群",
        "Chinese terms spelled with 速",
        "Chinese terms with IPA pronunciation",
        "Mandarin lemmas",
        "Mandarin nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "zh:Physics"
      ],
      "glosses": [
        "group velocity"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "group velocity",
          "group velocity"
        ]
      ],
      "raw_glosses": [
        "(physics) group velocity"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "sounds": [
    {
      "tags": [
        "Mandarin",
        "Pinyin"
      ],
      "zh-pron": "qúnsùdù"
    },
    {
      "tags": [
        "Mandarin",
        "bopomofo"
      ],
      "zh-pron": "ㄑㄩㄣˊ ㄙㄨˋ ㄉㄨˋ"
    },
    {
      "tags": [
        "Hanyu-Pinyin",
        "Mandarin"
      ],
      "zh-pron": "qúnsùdù"
    },
    {
      "tags": [
        "Mandarin",
        "Tongyong-Pinyin"
      ],
      "zh-pron": "cyúnsùdù"
    },
    {
      "tags": [
        "Mandarin",
        "Wade-Giles"
      ],
      "zh-pron": "chʻün²-su⁴-tu⁴"
    },
    {
      "tags": [
        "Mandarin",
        "Yale"
      ],
      "zh-pron": "chyún-sù-dù"
    },
    {
      "tags": [
        "Gwoyeu-Romatsyh",
        "Mandarin"
      ],
      "zh-pron": "chyunsuhduh"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "цюньсуду"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "cjunʹsudu"
    },
    {
      "ipa": "/t͡ɕʰyn³⁵ su⁵¹⁻⁵³ tu⁵¹/",
      "tags": [
        "Mandarin",
        "Sinological-IPA"
      ]
    },
    {
      "ipa": "/t͡ɕʰyn³⁵ su⁵¹⁻⁵³ tu⁵¹/"
    }
  ],
  "word": "群速度"
}

{
  "called_from": "pronunciations/296/20230324",
  "msg": "Zh-pron header not found in zh_pron_tags or tags: '(Standard Chinese)⁺'",
  "path": [
    "群速度"
  ],
  "section": "Chinese",
  "subsection": "",
  "title": "群速度",
  "trace": ""
}