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pentahedron

American  
[pen-tuh-hee-druhn] / ˌpɛn təˈhi drən /

noun

plural

pentahedrons, pentahedra

  1. a solid figure having five faces.

pentahedron British  
/ ˌpɛntəˈhiːdrən /

noun

  1. a solid figure having five plane faces See also polyhedron

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • pentahedral adjective

Etymology

Origin of pentahedron

First recorded in 1655–65; penta- + -hedron

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In turn it was a sphere, a disk, a pyramid, a pentahedron, a polyhedron.

From "Where Angels Fear to Tread" and Other Stories of the Sea by Robertson, Morgan

Platonic bodies; cube, rhomboid; tetrahedron, pentahedron, hexahedron, octahedron, dodecahedron, icosahedron, eicosahedron; prism, pyramid; parallelopiped; curb roof, gambrel roof, mansard roof.

From Roget's Thesaurus of English Words and Phrases by Roget, Peter Mark

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.