prismatoid

noun
pris·​ma·​toid | \ ˈpriz-mə-ˌtȯid How to pronounce prismatoid (audio) \

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

Keep scrolling for more

Learn More about prismatoid

Time Traveler for prismatoid

Time Traveler

The first known use of prismatoid was circa 1890

See more words from the same year

Statistics for prismatoid

Cite this Entry

“Prismatoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prismatoid. Accessed 26 Jan. 2021.

Comments on prismatoid

What made you want to look up prismatoid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

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