3D, 3-D, 3d, or Three D may refer to:

Science, technology, and mathematics

* A three-dimensional space in mathematics

Relating to three-dimensionality

* 3D computer graphics, computer graphics that use a three-dimensional representation of geometric data * 3D display, a type of information display that conveys depth to the viewer * 3D film, a motion picture that gives the illusion of three-dimensional perception * 3D modeling, developing a representation of any three-dimensional surface or object * 3D printing, making a three-dimensional solid object of a shape from a digital model * 3D television, television that conveys depth perception to the viewer * 3D projection * 3D rendering * 3D scanning, making a digital representation of three-dimensional objects * 3D video game *

Stereoscopy Stereoscopy, also called stereoscopics or stereo imaging, is a technique for creating or enhancing the depth perception, illusion of depth in an image by means of stereopsis for binocular vision. The word ''stereoscopy'' derives . Any ster ...

, any technique capable of recording three-dimensional visual information or creating the illusion of depth in an image * Three-dimensional space

Other uses in science and technology

* 3-D Secure, a secure protocol for online credit and debit card transactions * Biela's Comet, a lost periodic comet discovered in 1826, also known as 3D * British Rail Class 207, sometimes known as 3Ds

Music

Artists

* Robert Del Naja (born 1965), also known as 3D, English artist and musician in the band Massive Attack * The 3Ds, a rock band

Albums

* ''3D'' (Go West album), 2010 * ''3-D'' (I See Stars album), the debut album from the band I See Stars * ''3-D'' (SPC ECO album) * ''3D'' (The Three Degrees album), 1979 * ''3-D'' (TLC album), 2002 * ''3-D'' (Wrathchild America album) * "Weird Al" Yankovic in 3-D, 1984, sometimes simply referred to as 3-D

Songs

* "3D" (song), a 2023 song by Jungkook featuring Jack Harlow *"3-D", a song by Cheap Trick from their 1983 album '' Next Position Please''

Other uses

* 3D Aerobatics, a form of flying using flying aircraft to perform specific aerial maneuvers * 3D (Long Island bus), bus service in New York State * 3D Test of Antisemitism, put forth by Israeli politician and human rights activist Natan Sharansky * Middle finger, the third digit (abbreviated 3D) of the hand * Three D Radio, a community radio station in Adelaide, Australia * Three-dimensional chess * Threepence (disambiguation), a coin used in several countries, abbreviated as '3d' * The 3D ("Dudley Death Drop"), a professional wrestling double-team maneuver