roller

noun

1. a grounder that rolls along the infield
2. a long heavy sea wave as it advances towards the shore
3. a small wheel without spokes (as on a roller skate)
4. a cylinder that revolves
5. a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it"a woman with her head full of curlers is not a pretty sight"
6. Old World bird that tumbles or rolls in flight; related to kingfishers
7. pigeon that executes backward somersaults in flight or on the ground