词族 · heptagon
词形变化
中文词源
heptagon 七边形
来自希腊语hepta,七，词源同seven,-gon,边，角，词源同knee,hexagon.
英语词源
- 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.
权威例句
- 1. The pagoda has a base of heptagon.
- 这座宝塔有个七边形的底座。