etiopathogenesis
noun
etio·patho·gen·e·sis
variants:
or chiefly British aetiopathogenesis \ ˌēt-ē-ō-ˌpath-ə-ˈjen-ə-səs also ˌet- \
plural etiopathogeneses\ -ˌsēz 
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Medical Definition of etiopathogenesis
: the cause and development of a disease or abnormal condition