Dodecagon
/ˈdoʊ.də.kə.ɡɑːn/noun
A polygon with twelve sides and twelve angles.
Did you know?The -gon in dodecagon comes from Greek gōnia, meaning “angle” or “corner,” the same root behind words like pentagon and hexagon.
Etymological Timeline
Ancient Greek
Greek
dōdeka
“twelve”
Ancient Greek
Greek
gōnia
“angle, corner”
Late Greek
Greek
dōdekagōnon
“twelve-angled figure”
Late Latin
Latin
dodecagonum
“twelve-sided polygon”
16th Century
English
dodecagon
“a twelve-sided geometric figure”
Modern English
English
dodecagon
“a polygon with twelve sides and twelve angles”