Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
mass production
mass society
mass sociogenic illness
mass spectrometer
mass spectrum
mass transit
mass wasting
Massachusett
Massachusetts
Massachusetts Bay
massacre
massage
massage parlor
massage therapy
Massapequa
massasauga
masscult
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

mass-energy equivalence
mass-en·er·gy e·quiv·a·lence


noun 
Definition:
 
theory that mass equals energy: the principle in the theory of relativity that mass and energy are equivalent and interchangeable according to the equation E = mc2
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft