膠箍 [胶－]

Jyutping gaau1 ku1
Pinyin jiāo gū

Definitions (CC-CANTO)
  1. elastic band [colloquial]
Definitions (粵典–words.hk)
  1. x
Definitions (Kaifangcidian)
  1. 橡皮筋
  2. 橡皮圈