• synonyms


[pen-tuh-hee-druh n]
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noun, plural pen·ta·he·drons, pen·ta·he·dra [pen-tuh-hee-druh] /ˌpɛn təˈhi drə/.
  1. a solid figure having five faces.
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Origin of pentahedron

First recorded in 1655–65; penta- + -hedron
Related formspen·ta·he·dral, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pentahedron


noun plural -drons or -dra (-drə)
  1. a solid figure having five plane facesSee also polyhedron
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Derived Formspentahedral, adjective
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