di.op.ter
n.Abbr. D.（名词）缩写 D.A unit of measurement of the refractive power of lenses equal to the reciprocal of the focal length measured in meters.屈光度：透镜或棱镜折光率的一种量度，等于以米计算焦距之倒数
来源：Obsolete diopter [an instrument for measuring angles] 废语 diopter [测量角度的仪器] from Latin dioptra 源自 拉丁语 dioptra from Greek 源自 希腊语 dia- [dia-] dia- [前缀，表.完全的，有始有终的.] optos [visible] * see ok w- optos [可见] *参见 ok w-
【引伸】
diop.tral
