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Penrose stairs
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
2013 May 2 2014 May 2 2015 May 2
thumb|283px|upright|Penrose stairs.
Etymology
After a drawing by Lionel Penrose and Roger Penrose.
Pronunciation
en LL-Q1860 (eng)-Vealhurl-Penrose stairs.wav Southern England
Noun
p
An impossible loop of endlessly ascending and descending stairs, or an optical illusion appearing to depict such a loop.
en
Synonyms
impossible staircase
en Penrose staircase
en Penrose steps
Translations
endless staircase
Finnish: fi Penrosen portaat
German: de unmögliche Treppe f
Japanese: ja ペンローズ階段 ぺんろうぞかいだん, Penrōzu kaidan
Swedish: sv Penroses trappa c
Further reading
en eponyms
en Artistic works Optical illusions