voxel

Voxel is short for "volume pixel" the smallest distinguishable box-shaped part of a three-dimensional image. A voxel is the 3D conceptual counterpart of the 2D pixel.

Each voxel is a quantum unit of volume and has a numeric value (or values) associated with it that represents some measurable properties or independent variables of the real objects or phenomena. It is the smallest distinguishable box-shaped element of a three-dimensional space. A particular voxel will be identified by the x, y and z coordinates of one of its eight corners, or perhaps its centre. The term is used in three dimensional modeling and in the discussion of data cubes.