heptagon

• n. 七角形；[数] 七边形

来自希腊语hepta,七，词源同seven,-gon,边，角，词源同knee,hexagon.

heptagon (n.)

1560s, from Middle French heptagon, from Greek heptagonon, from hepta "seven" (cognate with Latin septem, Gothic sibun, Old English seofon; see seven) + gonia "angle" (see -gon). Related: Heptagonal.

1. The pagoda has a base of heptagon.

这座宝塔有个七边形的底座。

来自辞典例句