Zener cards
plural noun
Ze·ner cards
\ˈzēnə(r)-\
Definition of Zener cards
: a set of 25 cards that consists of 5 cards of each of 5 kinds bearing a circle, a rectangle, a cross, wavy lines, or a star and that is used in research in extrasensory perception
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Origin and Etymology of zener cards
after Karl E. Zener †1964 American psychologist
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