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1. Oxford Dictionary

   cuttlebone

   • IPA[ˈkʌtlbəʊn]

   英式

   • n.
     the flattened oval internal skeleton of the cuttlefish, which is made of white lightweight chalky material. It is used as a dietary supplement for cage birds and for making casts for precious metal items

   • noun: cuttlebone, plural noun: cuttlebones

2. • 釋義

   n.

   名詞

   • 1. the flattened oval internal skeleton of the cuttlefish, which is made of white lightweight chalky material. It is used as a dietary supplement for cage birds and for making casts for precious metal items parakeets require only a cuttlebone to hone their beaks cuttlebone has long been used for casting pieces of jewellery