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Jyutping gwai1 baan2
Pinyin guī bǎn

Definitions (CC-CEDICT)
  1. tortoise plastron
  2. turtle shell
Definitions (Wiktionary)
  1. noun, Chinese, traditional
    plastron of the fresh-water turtle
    (syn.) 王八蓋子, 王八蓋兒, 龜甲, 龜殼, 烏龜殼, 龜板