brumaire

from WordNet (r) 3.0 (2006)

Brumaire
    n 1: second month of the Revolutionary calendar (October and
         November); the month of mist

from The Collaborative International Dictionary of English v.0.48

Brumaire \Bru`maire"\, n. [F., fr. L. bruma winter.]
   The second month of the calendar adopted by the first French
   republic. It began thirty days after the autumnal equinox.
   See {Vendemiaire}.
   [1913 Webster]