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A prismatoid having polygons with the same number of sides as bases, and faces that are parallelograms or trapezoids.
pris·moi′dal (-moid′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.
(Mathematics) a prismatoid having an equal number of vertices in each of the two parallel planes and whose sides are trapeziums or parallelograms
[C18: from French prismoïde; see prism, -oid]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a solid having sides that are trapezoids and bases or ends that are parallel and similar but not congruent polygons. Compare prism (def. 2).
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||prismoid - a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms|
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
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