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Jyutping joek6 saan3
Pinyin yào sàn

Definitions (Wiktionary)
  1. noun, Cantonese, Min-Nan
    (medicinal) powder
    (syn.) 麵麵藥, 藥麵子, 藥麵兒, 藥粉, 麵麵兒藥, 末, 藥粉仔 GT, 藥散, 藥麵麵兒, 粉藥, 末藥, 藥末子, 藥末, 藥粉子, GT - General Taiwaneseno specific region identified), 藥麵麵, 藥粉 GT