Discussed in Aristotle's works so titled, Physics and Metaphysics "Physis, translated since the Third Century B.C. usually as "nature" and less frequently as "essence", means one thing for the presocratic philosophers and quite another thing for Plato." Welch, Kathleen Ethel. "Keywords from Classical Rhetoric: The Example of Physis." Rhetoric Society Quarterly 17.2 (1987): 193–204. Print. The Pontifical Academy of Sciences. Evolving Concepts of Nature. Proceedings of the Plenary Session, 24–28 October 2014, Acta 23, Vatican City, 2015. link.
Dunshirn, Alfred (2019): Physis [English version]. In: Kirchhoff, Thomas (ed.): Online Encyclopedia Philosophy of Nature / Online Lexikon Naturphilosophie. Heidelberg University Press. https://doi.org/10.11588/oepn.2019.0.66404: p.3
For the whole passage see Dunshirn, Alfred (2019): Physis [English version]. In: Kirchhoff, Thomas (ed.): Online Encyclopedia Philosophy of Nature / Online Lexikon Naturphilosophie. Heidelberg University Press. https://doi.org/10.11588/oepn.2019.0.66404: p.1