decagon

noun
deca·​gon | \ˈde-kə-ˌgän \

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

Statistics for decagon

Look-up Popularity

Time Traveler for decagon

The first known use of decagon was circa 1639

See more words from the same year

Keep scrolling for more

More Definitions for decagon

decagon

noun
deca·​gon | \ˈde-kə-ˌgän \

Kids Definition of decagon

: a closed figure having ten angles and ten sides

More from Merriam-Webster on decagon

See words that rhyme with decagon

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

a trusted follower

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

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!