decagon

noun
deca·​gon | \ ˈde-kə-ˌgän How to pronounce decagon (audio) \

Definition of decagon

: a plane polygon of 10 angles and 10 sides

Illustration of decagon

Illustration of decagon

First Known Use of decagon

circa 1639, in the meaning defined above

History and Etymology for decagon

New Latin decagonum, from Greek dekagōnon, from deka- deca- + -gōnon -gon

Keep scrolling for more

Learn More about decagon

Time Traveler for decagon

Time Traveler

The first known use of decagon was circa 1639

See more words from the same year

Statistics for decagon

Cite this Entry

“Decagon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decagon. Accessed 1 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Keep scrolling for more

More Definitions for decagon

decagon

noun
deca·​gon | \ ˈde-kə-ˌgän How to pronounce decagon (audio) \

Kids Definition of decagon

: a closed figure having ten angles and ten sides

Comments on decagon

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

WORD OF THE DAY

Test Your Vocabulary

February 2021 Words of the Day Quiz

  • squirrel in winter
  • Which is a synonym of perdure?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

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!