parallax

名词 parallax:

1. the apparent displacement of an object as seen from two different points that are not on a line with the object

par.al.lax

n.（名词）
An apparent change in the direction of an object, caused by a change in observational position that provides a new line of sight.
视差，视差量：由决定新视线的观察位置的变化引起的物体方向的明显变化

来源：
French parallaxe
法语 parallaxe
from Greek parallaxis
源自 希腊语 parallaxis
from parallassein [to change]
源自 parallassein [改变]
para- [among] * see para-
para- [在…之中] *参见 para-
allassein [to exchange] from allos [other] * see al-
allassein [交换，互换] 源自 allos [其它的] *参见 al-

【引伸】
par.allac.tic