Source : Webster's Revised Unabridged Dictionary (1913)

Montgolfier \Mont`gol"fier\, n.
   A balloon which ascends by the buoyancy of air heated by a
   fire; a fire balloon; -- so called from two brothers, Stephen
   and Joseph Montgolfier, of France, who first constructed and
   sent up a fire balloon.

Source : WordNet®

Montgolfier
     n 1: French inventor who (with his brother Josef Michel
          Montgolfier) pioneered hot-air ballooning (1745-1799)
          [syn: {Jacques Etienne Montgolfier}]
     2: French inventor who (with his brother Jacques Etienne
        Montgolfier) pioneered hot-air ballooning (1740-1810)
        [syn: {Josef Michel Montgolfier}]