候風地動儀 [－风－动仪]

Jyutping hau6 fung1 dei6 dung6 ji4
Pinyin hòu fēng dì dòng yí

Definitions (CC-CEDICT)
  1. the world's first seismograph invented by Zhang Heng 張衡|张衡[Zhang1 Heng2] in 132