Search Result for "rest energy":
Wordnet 3.0

NOUN (1)

1. the energy equivalent to the mass of a particle at rest in an inertial frame of reference; equal to the rest mass times the square of the speed of light; 



WordNet (r) 3.0 (2006):

rest energy
    n 1: the energy equivalent to the mass of a particle at rest in
         an inertial frame of reference; equal to the rest mass
         times the square of the speed of light