epiphenomenal
adjective
epi·phe·nom·e·nal ˌe-pi-fi-ˈnä-mə-nᵊl 
: of or relating to an epiphenomenon : derivative
epiphenomenally
ˌe-pi-fi-ˈnä-mə-nᵊl-ē
adverb 
Example Sentences
Recent Examples on the Web But even the problem of social media seems to me epiphenomenal. 
Matthew Walther, TheWeek, 15 Sep. 2020 Culture becomes epiphenomenal, a reflection of underlying social relations. Louis Menand, The New Yorker, 19 Aug. 2019
Matthew Walther, TheWeek, 15 Sep. 2020 Culture becomes epiphenomenal, a reflection of underlying social relations. Louis Menand, The New Yorker, 19 Aug. 2019 Word History
Etymology
epiphenomenon + -al entry 1
First Known Use
1899, in the meaning defined above