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Jyutping sik1 on1 syun1
Pinyin sè ān suān

Definitions (Wiktionary)
  1. noun, Taiwan
    tryptophan
    (syn.) 色氨酸

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Jyutping sik1 on1 syun1
Pinyin sè àn suān

Definitions (CC-CEDICT)
  1. tryptophan
Definitions (Wiktionary)
  1. noun, Taiwan
    tryptophan
    (syn.) 色氨酸