Button

Word of the day: button - pronunciation: /ˈbʌt(ə)n/
noun

1 a small disc or knob sewn on to a garment, either to fasten it by being pushed through a slit made for the purpose or for decoration.
2 a small device on a piece of electrical or electronic equipment which is pressed to operate it.
3 chiefly North American a badge bearing a design or slogan and pinned to clothing.