We don't have synonyms for cuttlebone yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cuttle bone and cuttlebones.
(n) :
Synonym of cuttlefish bone (“the calcareous, oval-shaped internal shell of a cuttlefish (order Sepiida), originally used in powdered form as an antacid and for absorbing moisture or polishing objects, and now chiefly as a dietary supplement for cage birds”).
(n) :
Synonym of cuttlefish bone (“the calcareous, oval-shaped internal shell of a cuttlefish (order Sepiida), originally used in powdered form as an antacid and for absorbing moisture or polishing objects, and now chiefly as a dietary supplement for cage birds”).