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Jyutping liu1 jyun4
Pinyin liū yuán

Definitions (Wiktionary)
  1. adj, dialectal
    perfectly round
    (syn.) 圆轱蓝屈, 圆轱辘膏, 圓軲藍屈, 圓軲轆膏

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Jyutping lau6 jyun4
Pinyin liū yuán

Definitions (CC-CEDICT)
  1. perfectly round