prismatoid

[priz-muh-toid]

noun Geometry.

a polyhedron having its vertices lying on two parallel planes.

Origin of prismatoid

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

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British Dictionary definitions for prismatoid

prismatoid

noun

a polyhedron whose vertices lie in either one of two parallel planesCompare prism (def. 3), prismoid

Derived Formsprismatoidal, adjective

Word Origin for prismatoid

C19: from Greek prismatoeidēs shaped like a prism; see prism, -oid

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