parallax

English Thesaurus

1. the apparent displacement of an object as seen from two different points that are not on a line with the object (noun.phenomenon)

hypernym	:	optical phenomenon,
definition	:	a physical phenomenon related to or involving light (noun.phenomenon)

hyponym	:	annual parallax, heliocentric parallax,
definition	:	the parallax of a celestial body using two points in the earth's orbit around the sun as the baseline (noun.phenomenon)

hyponym	:	diurnal parallax, geocentric parallax,
definition	:	the parallax of a celestial body using two points on the surface of the earth as the earth rotates (noun.phenomenon)