prismoid

[ priz-moid ]

/ ˈprɪz mɔɪd /

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).

Nearby words

prismatic, prismatic compass, prismatic layer, prismatic telescope, prismatoid, prismoid, prison, prison camp, prison fever, prison psychosis, prison rustic work

Origin of prismoid

First recorded in 1695–1705; prism + -oid

Related formspris·moi·dal, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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 Formsprismoidal, 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