prismoid

[ priz-moid ]

noun

, Geometry.

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

prismoid

/ ˈprɪzmɔɪd /

noun

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

Derived Forms

• prisˈmoidal, adjective

Other Words From

• pris·moidal adjective

Word History and Origins

Origin of prismoid¹

First recorded in 1695–1705; prism + -oid

Word History and Origins

Origin of prismoid¹

C18: from French prismoïde; see prism , -oid