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Jyutping saam1 jyun4 jam1
Pinyin sān yuán yīn

Definitions (Wiktionary)
  1. noun
    triphthong
    (syn.) 三合元音

三元音 [---]

Jyutping
Pinyin sān yuán yīn

Definitions (CC-CEDICT)
  1. triphthong (such as putonghua uei etc)