prismatoid

pris·ma·toid

 (prĭz′mə-toid′)

n.

A polyhedron all of whose vertices lie in one of two parallel planes.

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[Greek prīsma, prīsmat-, prism + -oid.]

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pris′ma·toi′dal (-toid′l) 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.

prismatoid

(ˈprɪzməˌtɔɪd)

n

(Mathematics) a polyhedron whose vertices lie in either one of two parallel planes. Compare prism³, prismoid

[C19: from Greek prismatoeidēs shaped like a prism; see prism, -oid]

ˌprismaˈtoidal adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pris•ma•toid

(ˈprɪz məˌtɔɪd)

n.

a polyhedron having its vertices lying on two parallel planes.

[1855–60; < Greek prīsmat- (s. of prîsma) prism]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Thesaurus

Noun

1.

prismatoid - a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid polyhedron - a solid figure bounded by plane polygons or faces prismoid - a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms

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