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3-D or 3D abbreviates "three dimensional" and is often related to a stereoscopic display that exploits binocular vision.

Three dimensional objects have volume and may be measured and described using three orthogonal directions.

In animation, 3-D sometimes refers to shaded, modeled shapes that have an apearance of depth, as opposed to the "flat" rendering of conventional cell animation. An example of this was seen in a particular episode of the animated video cartoon The Simpsons, where Homer escapes his flatland world and enters a universe of higher dimensionality. The figure renderings and visual effects in this episode were accomplished using 3D computer graphics.

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