1887 E. D. Cope Primary Factors Org. Evol. 488 Changes may be effected in the weight, colour, and in functional capacity by temperature, humidity, food, &c., thus exhibiting physiogenesis.

1896 Science 25 Sept. 458/2 Illustrations quoted from various authors of cases of physiogenesis, as the conversion of Artemia into Branchionecta.

1934 Science 17 Aug. 148/1 Cope maintained..that variations are the materials of evolution and that they are caused (1) by the direct action of the environment on developed organisms (his Physiogenesis) [etc.].

1890 Cent. Dict. Physiogenesis, same as physiogeny.

1952 H. C. Andrewartha in Biol. Rev. 27 53 The physiological development, or physiogenesis, which goes on during the diapause stage in preparation for the active resumption of morphogenesis.

1955 Times 2 Sept. 11/4 Immunological methods open the way for..great advances in our understanding of the development of function: of physiogenesis rather than morphogenesis.

1967 Q. Rev. Biol. 42 32/1 A particular embryonic regulation sets the stage for a particular aspect of morphogenesis or physiogenesis.

1976 Proc. Royal Soc. B. 192 332 To correlate the morphogenesis of this system with its physiogenesis that is the development of its function.

1991 Exper. & Appl. Acarol. 10 231 If environmental conditions preclude moulting, the hypopus following ending of physiogenesis enters a state of quiescence.

2003 BMC Developmental Biol. 3 8/1 Such development appears to be primarily physiological rather than morphological, and was defined as physiogenesis by Andrewartha.

1951 Jrnl. Criminal Law, Criminol., & Police Sci. 42 193 The anatomy of the subject [sc. sexual psychopathy] is hardly known; there is no specific statement of the types and conditions... Still less is known of its physiology—the physiogenesis, psychogensis [sic], and psychodynamics.

1982 Jrnl. Health & Soc. Behavior 23 237/2 A thorough understanding of the role of physiogenic symptoms..requires a symptom-by-symptom discrimination of psychogenesis from physiogenesis for each individual reporting symptoms.

1997 Jrnl. Psychosomatic Res. 42 312 Ideas on the psychogenesis and physiogenesis of hysteria proposed by psychiatrists after the 1920s muddled the waters and led to an increasing alienation of psychiatry from general medicine throughout this century.