(n) :
the change of angularposition of two stationary points relative to each other as seen by an observer, due to the motion of an observer; the apparent shift of an object against a background due to a change in observer position
(n) :
the change of angularposition of two stationary points relative to each other as seen by an observer, due to the motion of an observer; the apparent shift of an object against a background due to a change in observer position