Müller-Lyer illusion

[ muhl-er-lahy-er, myoo-ler-, mil-er-; German myl-uhr-lee-uhr ]

noun
  1. a geometric illusion in which two lines of equal length appear unequal depending on whether angular lines forming arrowheads at each end point toward or away from each other.

Origin of Müller-Lyer illusion

1
After Franz-Karl Müller-Lyer (1857–1916), German sociologist, who described the illusion in 1889

Words Nearby Müller-Lyer illusion

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British Dictionary definitions for Müller-Lyer illusion

Müller-Lyer illusion

/ (ˈmuːləˈlaɪə) /


noun
  1. an optical illusion in which a line with inward pointing arrowheads is seen as longer than an equal line with outward pointing arrowheads

Origin of Müller-Lyer illusion

1
C19: named after Franz Müller-Lyer (1857–1916), German sociologist and psychiatrist

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