3-D may refer to any of the following:
1. Alternatively referred to as three-dimensional, 3-D or 3D is a description of a visual object with the appearance of depth and field. The picture is an example of a 3-D ball that is overlaying a wireframe.
A great example of a free, open source 3-D program, for anyone interested in the field of graphics and animation, is Blender.
Should I use "3D" or "3-D" in my writing?
Today, both versions of "3-D" and "3D" are widely used and vary depending on the style guide you follow. We follow the Microsoft Manual of Style and use "3-D" (with a hyphen) in our writing unless "3D" is part of a product name.
2. A 3-D accelerator is a graphics card with additional processing power and memory for improving the performance and enhancing the appearance of 3-D images. See our graphics accelerator for further information.
3. When referring to audio, 3-D is a method of describing sound that is seemingly coming from all directions.