烏賊骨 [乌贼－]

Jyutping wu1 caak6 gwat1
Pinyin wū zéi gǔ

Definitions (Wiktionary)
  1. noun
    cuttlebone (An substance used in traditional Chinese medicine.)
    (syn.) 螵蛸, 墨贼船, 墨賊船, 海螵蛸