bisector,-trix

[数]平分线; 平分面; 二等分物; 特殊用法：; acute bisector; [采矿]锐角等分线; average bisector; 平均二等分线; external bisector; 外(平)分角线, 外(角)平分线; internal bisector; 内分角线, (内)角平分线; perpendicular bisector; 中垂线