scroll wheel

Noun

 * 1)  A hard plastic or rubbery disc on a computer mouse, used for scrolling.
 * 2)  A cog wheel in the form of a scroll.

Translations

 * Chinese:
 * Mandarin:
 * Czech: skrolovací kolečko
 * French:
 * German: Scrollrad
 * Polish:
 * Vietnamese: con lăn chuột, cuộn chuột, cuộn con chuột, bánh xe cuộn, bánh xe con chuột