What do a.m. and p.m. stand for?


[trak-bawl] /ˈtrækˌbɔl/
a computer input device for controlling the pointer on a display screen by rotating a ball set inside a case.
Origin of trackball
1975-1980 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for trackball
  • Manufacturers introduced the trackball, based on the same technology, as an alternative to the mouse on laptop computers.
  • Dorothy is controlled entirely with the touchscreen, which has a virtual emerald trackball on it.
  • The pointing device is a trackball that does not fit on the keyboard platform.
  • The keyboard and trackball shall allow for either left or right handed use.
  • Visitors use a trackball to scroll across the screen which describes the sanctuary's features as they go.
  • Device that moves the onscreen pointer by spinning a rubber trackball.
British Dictionary definitions for trackball


(computing) a device consisting of a small ball, mounted in a cup, which can be rotated to move the cursor around the screen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source

Word of the Day

Difficulty index for trackball

Few English speakers likely know this word

Word Value for trackball

Scrabble Words With Friends