n.
An apparent change in the direction of an object, caused by a change in observational position that provides a new line of sight.
[French parallaxe, from Greek parallaxis, from parallassein, to change : para-, among; see para-1 + allassein, to exchange (from allos, other; see al-1 in Indo-European roots).]
par'al·lac'tic (-lāk'tĭk) adj.
![[P]](http://cache.lexico.com/g/d/premium_mh.gif){kind=small}
