American Heritage® Dictionary of the English Language, Fourth
Edition - n. A solid with six faces, each a parallelogram and
each being parallel to the opposite face. Century Dictionary and
Cyclopedia - n. A prism whose bases are parallelograms. - n. in
experimental psychology, an outline drawing of a parallelepiped,
with one diagonal drawn in, embodying an illusion of reversible
perspective. The figure was published by Necker in 1832: the
name ‘cube’ properly belongs to a similar figure published by
Wheatstone in 1838. See illusion. 2. - n. geometry Solid figure,
having six faces, all parallelograms; all opposite faces being
similar and parallel. GNU Webster's 1913 - n. (Geometry) A prism
whose bases are parallelograms. - n. a prism whose bases are
parallelograms - Greek parallēlepipedon : parallēlos, parallel;
see parallel + epipedon, plane surface, from neuter sing. of
epipedos, level (epi-, epi- + pedon, ground). (American
Heritage® Dictionary of the English Language, Fourth Edition)
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