Search Result for "relativity theory":
Wordnet 3.0

NOUN (1)

1. (physics) the theory that space and time are relative concepts rather than absolute concepts;
[syn: relativity, theory of relativity, relativity theory, Einstein's theory of relativity]



WordNet (r) 3.0 (2006):

relativity theory
    n 1: (physics) the theory that space and time are relative
         concepts rather than absolute concepts [syn: relativity,
         theory of relativity, relativity theory, Einstein's
         theory of relativity]