n.
A solid with six faces, each a parallelogram and each being parallel to the opposite face.
[Greek parallēlepipedon : parallēlos, parallel; see parallel + epipedon, plane surface, from neuter sing. of epipedos, level (epi-, epi- + pedon, ground).]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.