Source : Webster's Revised Unabridged Dictionary (1913)

Colt revolver \Colt revolver\ (Firearms)
   A revolver made according to a system using a patented
   revolving cylinder, holding six cartridges, patented by
   Samuel Colt, an American inventor, in 1835. With various
   modifications, it has for many years been the standard for
   the United States army.