physiogenesis
/ˌfɪzɪəʊˈdʒɛnɪsɪs/noun
1 Biology. The development or evolution (ontogeny or phylogeny) of physiological functions; specifically physiological development during diapause.
2 Psychology and Medicine. The development of disease (especially mental illness) or symptoms as a result of physiological or physical causes; physiological or physical pathogenesis. Chiefly opposed to psychogenesis. Compare earlier physiogenic.
Origin
Late 19th century; earliest use found in The Century Dictionary. From physio- + -genesis. With sense 1 compare earlier physiogeny.