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Jyutping muk6 wai6 sei3
Pinyin mù wèi sì

Definitions (Wiktionary)
  1. name
    Callisto

木衛四 [-卫-]

Jyutping
Pinyin mù wèi sì

Definitions (CC-CEDICT)
  1. Callisto (moon of Jupiter), aka Jupiter IV