relativistic

Of or relating to relativism.

Of, relating to, or resulting from speeds approaching the speed of light.

Having to do with or based on the theory of relativity.

of, pertaining to, or in conformity with the theory of relativity.

moving at a speed sufficiently high that the changes of mass or time dilation predicted by the theory of relativity may be observed; moving at a significant fraction of the speed of light.

of, or relating to relativity

at, or near the speed of light

of, or relating to relativism

of or relating to the philosophical doctrine of relativism