3D

3D or 3-D may refer to:

Science and technology

3D computer graphics, computer graphics that use a three-dimensional representation of geometric data
3D modeling, developing a mathematical representation of any three-dimensional surface or object
3D printing, making a three-dimensional solid object of a shape from a digital model
3D projection
3D rendering
3D scanning, making a digital representation of three-dimensional objects
Stereoscopy, any technique capable of recording three-dimensional visual information or creating the illusion of depth in an image
3D film, a motion picture that enhances the illusion of depth perception
3D television, television that conveys depth perception to the viewer
3D video game (disambiguation)

3-D (band), a U.S. rock band of the early 1980s
Robert Del Naja (born 1965), English artist and musician in the band Massive Attack
The 3Ds, a rock band

Biela's Comet, a lost periodic comet discovered in 1826
3D (Long Island bus)
British Rail Class 207, sometimes known as 3Ds
3-D Secure, a secure protocol for online credit and debit card transactions
Threepence (British coin), a denomination of currency used by various jurisdictions in England, Ireland, Scotland and Wales
Middle finger, the third digit (abbreviated 3D) of the hand