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

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The first known use of decagon was circa 1639

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More Definitions for decagon

decagon

noun
deca·gon | \ ˈde-kə-ˌgän \

Kids Definition of decagon

: a closed figure having ten angles and ten sides

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