頂針子 [顶针－]

Jyutping ding2 zam1 zi2
Pinyin dǐng zhēn zi

Definitions (Wiktionary)
  1. noun, Jin
    thimble (a protective cap for the finger)
    (syn.) 針黹, 顶针, 頂針, 针指, 针黹, 針指