prismatoid

American

[priz-muh-toid] / ˈprɪz məˌtɔɪd /

noun

Geometry.

a polyhedron having its vertices lying on two parallel planes.

prismatoid British

/ ˈprɪzməˌtɔɪd /

noun

a polyhedron whose vertices lie in either one of two parallel planes Compare prism prismoid

"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

prismatoidal adjective

Etymology

Origin of prismatoid

1855–60; < Greek prīsmat- (stem of prîsma ) prism + -oid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A scutoid is more complicated than a prismatoid, which is more complicated than a frusta, which is more complicated than a prism.

From Scientific American

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