Dictionary
rel•a•tiv•is•tic
Pronunciation: (rel"u-tu-vis'tik), [key]—
adj.
1. of or pertaining to relativity or relativism.
2. Physics.
a. subject to the special or the general theory of relativity.
b. (of a velocity) having a magnitude that is a significant fraction of the speed of light.
c. (of a particle) having a relativistic velocity:
radiation from relativistic electrons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.