abiotrophy

noun

abi·​ot·​ro·​phy ˌā-(ˌ)bī-ˈä-trə-fē 

plural abiotrophies

: degeneration or loss of function or vitality in an organism or in cells or tissues not due to any apparent injury

senile dementia and related abiotrophies

—David Bowen

abiotrophic

ˌā-ˌbī-ō-ˈtrō-fik  -ˈträf-ik 

adjective