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

Science, technology, and mathematics

Relating to three-dimensionality

* Three-dimensional space ** 3D computer graphics, computer graphics that use a three-dimensional representation of geometric data ** 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 display, a type of information display that conveys depth to the viewer ** 3D television, television that conveys depth perception to the viewer ** Stereoscopy, any technique capable of recording three-dimensional visual information or creating the illusion of depth in an image

Other uses in science and technology or commercial products

* 3D projection * 3D rendering * 3D scanning, making a digital representation of three-dimensional objects * 3D video game (disambiguation) * 3-D Secure, a secure protocol for online credit and debit card transactions * Biela's Comet, a lost periodic comet discovered in 1826 * 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), ''3D'' (Go West album), 2010 * 3D (The Three Degrees album), ''3D'' (The Three Degrees album), 1979 * 3-D (I See Stars album), ''3-D'' (I See Stars album), the debut album from the band I See Stars * 3-D (SPC ECO album), ''3-D'' (SPC ECO album) * 3D (TLC album), ''3-D'' (TLC album), 2002 * 3-D (Wrathchild America album), ''3-D'' (Wrathchild America album)

Songs

*"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-dimensional chess * Threepence (disambiguation), a coin used in several countries, abbreviated as '3d' * The 3D ("Dudley Death Drop"), a Professional wrestling double-team maneuvers#Death Drop, professional wrestling double-team maneuver