thumbnail

/ˈθʌm.neɪl/noun

A small version of an image that stands in for the full-size picture.

Example sentence

“Click the thumbnail to open the photo at full size.”

The image sense grew out of 'thumbnail sketch', a quick tiny drawing. YouTube made the word part of ordinary speech.

Related words

clipboardA stiff board with a spring clip at the top that holds sheets of paper in place.checkboxA small square on a screen that you click to add or remove a check mark, turning an option on or off.dropdownA menu or selection box on a screen that keeps its list of options hidden until you click on it.sidebarA column of extra content or links displayed along one side of a webpage.toolbarA strip of icon buttons in a program or operating system that lets you trigger its functions with a click.layoutThe way things are arranged or organized within a given space.