pris·​ma·​toid ˈpriz-mə-ˌtȯid How to pronounce prismatoid (audio)
: a polyhedron that has all of its vertices in two parallel planes

Word History


Late Latin prismat-, prisma prism

First Known Use

circa 1890, in the meaning defined above

Time Traveler
The first known use of prismatoid was circa 1890

Dictionary Entries Near prismatoid

Cite this Entry

“Prismatoid.” Dictionary, Merriam-Webster, Accessed 23 Jul. 2024.

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