parallax

noun
  1. 1

    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.

  2. 2

    The angle of seeing of the astronomical unit.

verb
  1. 1

    To measure (a distance) based on parallax observations.

  2. 2

    To produce an illusion of levels of distance by shifting layers at different rates.

Source: https://en.wiktionary.org/wiki/parallax