roller

roller /ˈroʊlɚ/ noun
plural rollers
roller
/ˈroʊlɚ/
noun
plural rollers
Britannica Dictionary definition of ROLLER
[count]
1 
a  : a part that rolls and is used to move, press, shape, spread, or smooth something
— see also steamroller
b  : a cylinder or rod on which something (such as a window shade or a map) is rolled up
2 
: a small plastic or metal tube around which hair is wrapped to make it curl
3 
: a long, powerful ocean wave
4 
: a ball that rolls slowly along the ground