Search Result for "mass-energy equivalence":
Wordnet 3.0

NOUN (1)

1. (physics) the principle that a measured quantity of mass is equivalent (according to relativity theory) to a measured quantity of energy; 



WordNet (r) 3.0 (2006):

mass-energy equivalence
    n 1: (physics) the principle that a measured quantity of mass is
         equivalent (according to relativity theory) to a measured
         quantity of energy