milliard

from WordNet (r) 3.0 (2006)

milliard
    n 1: a billion; "in England they call one thousand million a
         milliard"

from The Collaborative International Dictionary of English v.0.48

Milliard \Mil`liard"\ (F. m[-e]l`y[.a]r"; E.
   m[i^]l"l[i^]*[aum]rd), n. [F., from mille, mil, thousand, L.
   mille.]
   A thousand millions; -- usually called {billion} in the
   United States. See {Billion}.
   [1913 Webster]