1) Cuttle
Found on
https://www.crosswordclues.com/clue/cuttlebone
1) Mollusc product
Found on
https://www.crosswordclues.com/clue/cuttlebone
Cuttlebone, also known as cuttlefish bone, is a hard, brittle internal structure (an internal shell) found in all members of the family Sepiidae, commonly known as cuttlefish, a family within the cephalopods. Cuttlebone is composed primarily of aragonite. It is a chambered, gas-filled shell used for buoyancy control; its siphuncle is highly modifi...
Found on
http://en.wikipedia.org/wiki/Cuttlebone
(from the article `cuttlefish`) any of several marine cephalopods of the order Sepioidea, related to the octopus and squid and characterized by a thick, internal, calcified shell ... ...when the squids are pursued by predatory fishes and dolphins. When the squid jets rapidly through the water, the fins are often curled tightly ... [...
Found on
http://www.britannica.com/eb/a-z/c/172
the calcareous internal shell of cuttlefishes, used to make powder for polishing and fed to canaries and other pet birds to supply their diet with lime.
Found on
https://www.infoplease.com/dictionary/cuttlebone
No exact match found.
