Newtonian

adjective
New·​to·​ni·​an | \nü-ˈtō-nē-ən, nyü-, -nyən\

Definition of Newtonian 

1 : of or relating to Sir Isaac Newton or his doctrines

First Known Use of Newtonian

1676, in the meaning defined at sense 1

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The first known use of Newtonian was in 1676

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Newtonian

adjective
New·​to·​ni·​an | \n(y)ü-ˈtō-nē-ən \

Medical Definition of Newtonian 

: of, relating to, or following Sir Isaac Newton, his discoveries, or his doctrines Newtonian dynamics

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