prismoid

[priz-moid]

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).

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

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

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