troilism

/ (ˈtrɔɪlɪzəm) /

noun

sexual activity involving three people

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Derived forms of troilism

troilist, adjective

Word Origin for troilism

C20: perhaps from French trois three (compare ménage à trois) + -l-, as in dualism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012