Definition of "trackball" [trackball]

• A ball mounted in a stationary housing and rotated to control a pointer on a computer screen. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "It feels faster and navigating with the trackball is actually easier than using your fingers."
• "For that alone I am glad the trackball is there .... akbar56"
• "Surprise, the left-click on my trackball was all worn out!"