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Jyutping niu6
Pinyin niào

Definitions (CC-CANTO)
  1. carbamide/urea (NH)2CO/also written 尿素
Definitions (Wiktionary)
  1. character
    urea
Definitions (Unihan)
  1. urea
  2. Cangjie Input
    BSE

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Jyutping liu6
Pinyin niào

Definitions (CC-CEDICT)
  1. carbamide
  2. urea (NH2)2CO
  3. also written 尿素
Definitions (CC-CANTO)
  1. carbamide/urea (NH)2CO/also written 尿素