E=mc²...Whats the C?(Answered)

Hiya, Today i was in Global Studies and we were talking about famous people and we got on the subject of Einstein's Atomic equation E=mc²... I know htat the E=M is Energy=Mass but i dont know what the C stands for. Anyone have an idea? Ive been told that its The Speed of Light squared but ive also been told that its the speed of whatever your trying to figure out the energy for.

[edit on 11/18/2005 by syberwolff]

speed of light squared.

Ok thanks. Yea it told me that i need to put more here so heres more here