prismoid

[ priz-moid ]

/ ˈprɪz mɔɪd /

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noun Geometry.

a solid having sides that are trapezoids and bases or ends that are parallel and similar but not congruent polygons.Compare prism (def. 2).

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Origin of prismoid

First recorded in 1695–1705; prism + -oid

OTHER WORDS FROM prismoid

pris·moi·dal, adjective

Words nearby prismoid

prismatic layer, prismatic telescope, prismatoid, prism binocular, prism diopter, prismoid, prison, prison camp, prisoner, prisoner of war, prisoner's base

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for prismoid

prismoid

/ (ˈprɪzmɔɪd) /

noun

a prismatoid having an equal number of vertices in each of the two parallel planes and whose sides are trapeziums or parallelograms

Derived forms of prismoid

prismoidal, adjective

Word Origin for prismoid

C18: from French prismoïde; see prism, -oid

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