heptagonWiktionary 原文英/ˈhɛp.tə.ɡən/美/ˈhɛp.tə.ɡɒn/构词拆解heptahepta-前缀gon-gon后缀hepta-Seven.-gon(geometry) Forms the names of plane figures containing a given number of internal angles, and thus bounded by that number of line segments (polygons).词源链古希腊语Ancient Greek约前 1500–前 300 年ἑπτάγωνον↓ 派生英语Englishheptagon词源说明Since 16th century, from Ancient Greek ἑπτάγωνον (heptágōnon), from ἑπτά (heptá, “seven”) + γωνία (gōnía, “angle”). By surface analysis, hepta- + -gon.释义名词noun1A polygon with seven sides and seven angles.同族词派生词 2heptagonal·heptagonally