octadecagon
十八边形
发音
US
词形变化
octadecagons
复数
octadecagons
释义与例句
n.
-
1.
A polygon with 18 sides and 18 vertices.
十八边形
罕用 数学A regular octadecagon cannot be constructed using a compass and straightedge.
词源
From octadeca- + -gon.
来源：wiktionary