roundness
/ˈraʊndnəs/ 15Roundness is the measure of how closely the shape of an object approaches that of a mathematically perfect circle.
noun [专属名词]圆；球形
His face had lost its boyish roundness. 他的脸已不是小时候那副圆圆的娃娃脸了。
单词造句:
His face had lost its boyish roundness. 他的脸已不是小时候那副圆圆的娃娃脸了。