newtonian

/N UW0 T OW1 N IY0 AH0 N/
adjective
  1. 1

    Of or relating to Isaac Newton, or his laws and theories.

  2. 2

    (of a fluid) Obeying Newton's law of viscosity; i.e. having a constant viscosity.

  3. 3

    Of or relating to classical physics that does not take relativity into account.

Source: https://en.wiktionary.org/wiki/Newtonian, https://en.wiktionary.org/wiki/newtonian