prismatoid

noun
pris·ma·toid | \ˈpriz-mə-ˌtȯid \

Definition of prismatoid 

: a polyhedron that has all of its vertices in two parallel planes

First Known Use of prismatoid

circa 1890, in the meaning defined above

History and Etymology for prismatoid

Late Latin prismat-, prisma prism

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The first known use of prismatoid was circa 1890

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