Definition for Pan
From Biology Forums Dictionary
1) a shot taken by a camera while it pivots horizontally left or right
2) From the Greek "pan" meaning "all" this movement of the camera is achieved by moving the camera while turning it on an horizontal access. At least four functions are served by this technique including an all encompasing view of the scene, a device for leading the audience to a particular person or place, following a person or vehicle across a distant scene, or giving the audience the visual images and perspective as seen by a character when turning her/his head. {A turn of the camera up or down on the vertical axis is called a "tilt."}