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Definition of troilism noun from the Oxford Advanced Learner's Dictionary

troilism

noun
 
/ˈtrɔɪlɪzəm/
 
/ˈtrɔɪlɪzəm/
[uncountable]
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  1. sexual activity involving three people
    Word Origin1950s: perhaps based on French trois ‘three’.
trait
noun
 
 
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