鏰兒 [镚儿]

Jyutping bang1 ji4
Pinyin bèngr

Definitions (Wiktionary)
  1. noun, historical
    small copper coin without holes during the late Qing dynasty
    (syn.) 鏰子, 镚子
  2. noun, broadly, colloquial
    small coin
    (syn.) 鏰子, 镚子