nonrelativistic

adjective

non·​rel·​a·​tiv·​is·​tic ˌnän-ˌre-lə-ti-ˈvi-stik 

1

: not based on or involving the theory of relativity

nonrelativistic equations

nonrelativistic kinematics

2

: of, relating to, or being a body moving at less than a relativistic velocity

nonrelativistically

ˌnän-ˌre-lə-ti-ˈvi-sti-k(ə-)lē 

adverb

Word History

First Known Use

1930, in the meaning defined at sense 1