1. The internal shell or skeletal structure of a cuttlefish, composed of calcium carbonate; often used as a dietary supplement for birds and small pets, or as a mild abrasive.
Usage: Plural of cuttlebone; Commonly found washed ashore on beaches; Used in pet care and bird nutrition

Examples

• Pet owners often place cuttlebones in bird cages to provide essential calcium.
• The beach was littered with white cuttlebones after the storm.
• Cuttlebones are lightweight and porous, making them ideal for grinding into powder.
• My parakeet gnaws on cuttlebones to keep its beak healthy.
• Jewelers sometimes use powdered cuttlebones as a polishing agent.