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Jyutping zi2 gwat1
Pinyin zhǐ gǔ

Definitions (Wiktionary)
  1. noun
    phalanx (of the fingers)
    (syn.) 掌头仔骨, 掌頭仔骨
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)