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prismoid

American

[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.

prismoid British

/ ˈprɪzmɔɪd /

noun

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

"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

Other Word Forms

prismoidal

adjective

Etymology

Origin of prismoid

First recorded in 1695–1705; prism + -oid

Example Sentences

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prismoid

The length of the prismoid base L for any given sample will be a distance equal to one-half the sum of the distances to the two adjacent samples.

From Principles of Mining Valuation, Organization and Administration by Herbert Hoover

The volume of ore appertaining to any given sample can be considered as a prismoid, the dimensions of which may be stated as follows:— W = Width in feet of ore sampled.

From Principles of Mining Valuation, Organization and Administration by Herbert Hoover

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023