aplanatic

形容词 aplanatic:

1. free from or corrected for spherical aberration

ap.la.nat.ic

adj.（形容词）
Of or relating to optical systems that correct for spherical aberration.
等光程的，透镜消球差的：矫正球面像差的光学系统或与之有关的

来源：
From a-
源自 a-
Greek planasthai [to wander] * see pel…- 2
希腊语 planasthai [漫步] *参见 pel…- 2