epiphenomenon

 
Pronunciation: /ˌɛpɪfəˈnɒmɪnən/

noun (plural epiphenomena /-nə/)

  • a secondary effect or by-product, in particular:
  • Medicine a secondary symptom, occurring simultaneously with a disease or condition but not directly related to it.
  • a mental state regarded as a by-product of brain activity.

Derivatives

epiphenomenal

adjective