Entry
  1. the world's first seismograph invented by Zhang Heng 張衡|张衡[Zhang1 Heng2] in 132; abbr. for 候風地動儀|候风地动仪[hou4 feng1 di4 dong4 yi2]

    trad. 地動儀

Also written 地動儀【dì dòng yí】

Characters in this word

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