dodecagon
noun /dəʊˈdekəɡən/
/dəʊˈdekəɡən/
(geometry- a flat shape with twelve straight sides and twelve angles
compare dodecahedronTopics Colours and Shapesc2十二边形;十二角形 词源late 17th cent.: from Greek dōdekagōnon, neuter (used as a noun) of dōdekagōnos ‘twelve-angled’.