parallax

Meanings

Noun

• An apparent shift in the position of two stationary objects relative to each other as viewed by an observer, due to a change in observer position.
• The angle of seeing of the astronomical unit.

Verb

• To measure (a distance) based on parallax observations.
• To produce an illusion of levels of distance by shifting layers at different rates.

Origin

• From Middle French parallaxe, from Ancient Greek παράλλαξις from παραλλάσσω from ἀλλάσσω from ἄλλος.