pris·​moid ˈpriz-ˌmȯid How to pronounce prismoid (audio)
: a prismatoid whose parallel bases have the same number of sides
prismoidal adjective

Word History

First Known Use

1881, in the meaning defined above

Time Traveler
The first known use of prismoid was in 1881

Dictionary Entries Near prismoid

Cite this Entry

“Prismoid.” Dictionary, Merriam-Webster, Accessed 15 Jul. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!