An input device used for pointing, designed as an alternative to the mouse. It is almost an upside-down mouse; it is stationary and contains a movable ball that you rotate using your fingers to move the mouse cursor on the screen.
Is usually described as looking like an upside-down mouse. A trackball remains stationary on your desk; as you move the sphere (ball) in the centre with your fingers or palm, sensors detect movement and cause the on-screen cursor to move. Some notebook computers have this type of directional device that attaches to one edge of the computer. Back to the Top
Resembles and functions like a mouse but does not have a contoured housing that fits neatly into a typical hand. Buttons on the trackball emulate the clicks of a mouse. Trackballs are easier to use for persons who cannot manipulate a mouse.
A stationary computer pointing device in which the user rolls a ball to move a cursor on a screen. A good alternative to the mouse if arm pain is present. Completely eliminates grip and reach problems. See equipment critiques.
A computer cursor control device. It is used in many notebook computers. The trackball is an upside-down mouse that rotates in place within a socket. The user rolls the ball to direct the cursor to the desired place on the screen and can click one of two buttons (identical to mouse buttons) near the trackball to select desktop objects or position the cursor for text entry. Many persons with Repetitive Strain Injury prefer a trackball to the use of a mouse. Persons with limited hand movement who cannot use a mouse can sometimes use a trackball.
An input device that operates very similary to a mouse. Where a mouse has a bell you roll on your table top, in the case of the track ball, the ball part is on top and you rotate it using your fingers.
A device, often used with laptop computers, that works like an upside-down mouse. It requires less desk space for use than a mouse, because instead of moving it around the desk to move the pointer on-screen, you roll it in place to move the pointer. Some arcade video games use devices similar to trackballs.
A pointing device built in to a portable computer that controls the movement of the cursor on the screen. Trackball-aware software allows you to activate commands by rolling the trackball and clicking its buttons while pointing at objects displayed on the screen.
n. A pointing device that consists of a ball resting on two rollers at right angles to each other, which translate the ball's motion into vertical and horizontal movement on the screen. A trackball also typically has one or more buttons to initiate other actions. A trackball's housing is stationary; its ball is rolled with the hand. Compare mechanical mouse.
A trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes—like an upside-down mouse with an exposed protruding ball. The user rolls the ball with the thumb, fingers, or the palm of the hand to move a cursor. Large tracker balls are common on CAD workstations for easy precision.