3-D

1. Also known as three-dimensional, 3-D is a description of a visual object that has the appearance of depth and field. 
2. When referring to an internal adapter card, a 3-D accelerator is a graphics card with additional processing power and memory that helps the performance and look of 3-D images. Also see graphics accelerator.
3. When referring to audio, 3-D is a method of describing sound that sounds as if it is coming from all directions. 

Also see: Graphics accelerator, Render, Video definitions, Z-axis