Example: "The Bing Images search results page can display several hundred thumbnail images."
A thumbnail is the nail on your thumb. If you look at your thumbnail, you will notice it is rather small in size. This is why the term "thumbnail" is also used to refer to a reduced size version of a digital image. While digital thumbnails might not always be as small as a human thumbnail, they are usually less than 200x200 pixels in size.
Thumbnails, or thumbnail images, are often used on the Web and in digital photo organization programs. Because of their small size, several thumbnails can be displayed on a single screen. This makes it possible to browse through several images at once. In most instances, clicking or double-clicking on a thumbnail will open the full size image.
Updated: May 24, 2010