Definitions for "Rollover image"
Keywords:  cursor, pointer, mouse, webdb, hovers
A rollover image is used in the context of navigation where an image button, that serves as a link elsewhere, changes into a different image because of some or other associated pointer behaviour (e.g. mouse down).
an image that changes to a different image when the mouse pointer is moved over the image
an image that changes when the mouse cursor hovers over it