Latin Phrases in American Government

Whenever I look at an American coin I see some Latin on it, and I always wonder what it means. 

Here is a short list of the Latin phrases found in American government buildings and coinage.

e pluribus unim
from many one, one from many
e = from
pluribus = many, more
unim = one

novus ordo seclorum

A new order for the ages 
novus = new
ordo = order
seclorum = ages, generations, or centuries