Also found in: Thesaurus, Encyclopedia.
click for a larger image


n. pl. pen·ta·he·drons or pen·ta·he·dra (-drə)
A solid having five plane faces.

pen′ta·he′dral (-drəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
The exhibit wraps up with a video installation "Epic Shanghai." Viewers look through a small window to find scenes from Chinese films from the 1930s such as "The Trail," "New Women" and "Angel of the Road" screened on an infinite number of monitors, which in fact are reflections in a pentahedral mirror.
Disc and pads have been discretized with 8-node hexahedral elements; plates have been modeled with 8-node hexahedral and 6-node pentahedral elements for the greater shape complexity.