English Explanatory Dictionary

Ames trapezoid

English dictionary entry

Meanings

noun
  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.

Word forms

Ames trapezoid Ames trapezoids

Etymology

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

Synonyms

Ames window
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