3D may refer to:

Three dimensional

• Something having three dimensions e.g. width, length, and depth
• Three-dimensional space, the physical universe we live in
  • A vector space or coordinate space with three dimensions
  • Volume, a measure of space
• Stereoscopy, any technique capable of recording three-dimensional visual information or creating the illusion of depth in an image
  • Stereo camera, a camera with two or more lenses that simulates human binocular vision
  • 3-D film, any visual presentation system that attempts to maintain or recreate moving images of the third dimension
  • 3D TV
  • 3D computer graphics, computer graphics modeling three-dimensional objects
  • Anaglyph image, a 3D effect when viewed with 2 color glasses
  • Stereogram, an optical illusion of depth created from a flat, two-dimensional image
• 3D Computer Aided Design or "3D CAD"
• Surround sound, sometimes called 3D sound

Other

• 3D/Biela, a lost periodic comet discovered in 1826
• 3D (album), by TLC
• British threepence coin, written as 3d, from the pre-decimal (£sd) system
• Robert Del Naja, an English artist and musician in the band Massive Attack
• 3-D (band), a short-lived American rock band of the early 1980s
• The 3D's rock band
• 3-D Secure, a secure protocol for online credit and debit card transactions

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Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "3D". Image Credit.

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