optical illusion

English Thesaurus

1. an optical phenomenon that results in a false or deceptive visual impression (noun.phenomenon)

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

hyponym	:	apparent motion, apparent movement, motion, movement,
definition	:	an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object (noun.phenomenon)

hyponym	:	mirage,
definition	:	an optical illusion in which atmospheric refraction by a layer of hot air distorts or inverts reflections of distant objects (noun.phenomenon)