relativistic

adjective relating or subject to the special or the general theory of relativity; `relativistic quantum mechanics`; `relativistic increase in mass`; `radiation from relativistic particles`
Found on https://www.encyclo.co.uk/local/20974

relativistic

A term used to describe any situation in which Einstein's theories of relativity makes predictions that are significantly different from those of classical (Newtonian) physics.
Found on http://www.daviddarling.info/encyclopedia/R/relativistic.html

Relativistic

Traveling at a significant fraction of the speed of light.
Found on http://www2.slac.stanford.edu/vvc/glossary.html

relativistic

[adj] - of or relating to the philosophical doctrine of relativism 2. [adj] - (physics) relating or subject to the special or the general theory of relativity
Found on http://www.webdictionary.co.uk/definition.php?query=relativistic
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