wing mirror 
noun
A rear-view mirror projecting from the side of a motor vehicle.Visibility in the miniscule rear view mirror is like watching traffic through a spy hole, whilst the wing mirror proves pretty much ornamental....
- I pulled myself aloft into the cab, steadied my nerves with a few deep breaths, checked the wing mirror, which is the size of a widescreen television, and pulled away.
- A quick blip of the keyfob, touch the button under the wing mirror, the glass lowers and the door pops open.