track ball


a computer input device for controlling the pointer on a display screen by rotating a ball set inside a case.

1975–1980 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
trackball or trackerball (ˈtrækˌbɔːl, ˈtrækəˌbɔːl)
computing a device consisting of a small ball, mounted in a cup, which can be rotated to move the cursor around the screen
trackerball or trackerball

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Computing Dictionary

track ball definition

tracker ball

The Free On-line Dictionary of Computing, © Denis Howe 2010
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