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The pathologic, physiologic, or biochemical mechanism resulting in the development of a disease or morbid process. Cf.:etiology. [patho- + G. genesis, production]
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patho·gen·e·sis .path-ə-'jen-ə-səs n, pl -e·ses -.sēz the origination and development of a disease called also pathogeny
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patho·gen·e·sis (path″o-jenґə-sis) [patho- + genesis] the development of morbid conditions or of disease; more specifically the cellular events and reactions and other pathologic mechanisms occurring in the development of disease. pathogenetic adjMedical dictionary. 2011.