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Jyutping jin4 seoi5
Pinyin yán suǐ

Definitions (CC-CEDICT)
  1. medulla oblongata (the lower half of the brainstem)
Definitions (Wiktionary)
  1. noun
    medulla oblongata; medulla
    (syn.) 延脑, 延腦
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)