widget

Short definition from Wiktionary

Noun

1. 1
   A placeholder name for an unnamed, unspecified, or hypothetical manufactured good or product, typically as an example for purposes of explaining concepts.
2. 2
   A floating device inside a beer can, meant to create foam when opened.
3. 3
   A small scraping tool consisting of a blade and a handle, commonly used to remove paint from glass and other smooth surfaces.
4. 4
   Synonym of tool, implement, device, gadget, part.
5. 5
   Any one of the components of a computer application's graphical user interface, such as a Cancel button or text input box that a user interacts with.
6. 6
   A small applet that can be placed on the desktop or in a sidebar, etc.