buton

Etymology
.

Noun

 * 1) button knob or small disc serving as fastener
 * 2) button mechanical device meant to be pressed
 * 3)  button on-screen control that can be selected
 * 1)  button on-screen control that can be selected

Etymology
Borrowed from.

Noun

 * 1) button, (mechanical device meant to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism)