Epiphenomenon Definition
 ĕpə-fĭ-nŏmə-nŏn 
  epiphenomena
  
    noun
  
 A phenomenon that occurs with and seems to result from another but has no reciprocal effect or subsequent influence.
 Webster's New World 
A secondary or additional occurrence in the course of a disease, usually unrelated to the disease.
 Webster's New World 
(philosophy, psychology) A mental state or process that is an incidental byproduct of physiological events in the brain or nervous system.
Wiktionary 
Other Word Forms of Epiphenomenon
Noun
Singular:
 epiphenomenonPlural:
 epiphenomenaOrigin of Epiphenomenon
-  epi- + phenomenon From Wiktionary 
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