post-Newtonian
/ˌpəʊs(t)njʊˈtəʊnɪən/adjective
Occurring or existing subsequent to the life or work of Sir Isaac Newton (1642–1727); specifically (Physics ) involving or taking into account relativistic effects, especially as a minor correction in calculations based on pre-relativistic Newtonian principles.
Origin
Mid 19th century; earliest use found in John Stuart Mill (1806–1873), philosopher, economist, and advocate of women's rights. From post- + Newtonian.