noun
1Biology
The development or evolution (ontogeny or phylogeny) of physiological functions; specifically physiological development during diapause.2Psychology 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".
Origin
Late 19th century; earliest use found in The Century Dictionary. From physio- + -genesis.
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