Ames trapezoid

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English

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English Wikipedia has an article on:
Wikipedia
Ames window

Etymology

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Discovered by American ophthalmologist Adelbert Ames, Jr. in 1947.

Noun

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Ames trapezoid (plural Ames trapezoids)

  1. An optical illusion in which a trapezoid, subdivided into squares to look like a paned window, and made to rotate, appears to be a rectangle.
    Synonym: Ames window