Piper

noun

1. A musician who plays a pipe.
2. A bagpiper.
3. A baby pigeon.
4. A common European gurnard (Trigla lyra), having a large head, with prominent nasal projection, and with large, sharp, opercular spines.
5. A sea urchin (Goniocidaris hystrix) with very long spines, native to the American and European coasts.