isoperimeter

n.等周图形(尤指等周几何图形)

等周线；等周曲线（指与给定的曲线等周的曲线）

名词

1. In geometry, an isoperimeter is a curve of equal perimeter with respect to some geometrical quantity.（在几何学中，等周线是相对某些几何量具有相等周长的曲线。）
2. An isoperimeter is a curve that connects two points in such a way that its length is minimal among all curves that have the same enclosed area.（等周线是一条将两个点连接起来的曲线，其长度在所有具有相同封闭面积的曲线中是最小的。）