名詞 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.（名詞）
An apparent change in the direction of an object, caused by a change in observational position that provides a new line of sight.
視差，視差量：由決定新視線(xiàn)的觀察位置的變化引起的物體方向的明顯變化

來(lái)源：
French parallaxe
法語(yǔ) parallaxe
from Greek parallaxis
源自 希臘語(yǔ) parallaxis
from parallassein [to change]
源自 parallassein [改變]
para- [among] * see para-
para- [在…之中] *參見(jiàn) para-
allassein [to exchange] from allos [other] * see al-
allassein [交換，互換] 源自 allos [其它的] *參見(jiàn) al-

【引伸】
par.allac.tic